Why does anyone have to suffer at all? At the end of the day I have no idea and neither does anyone else, that's how it always goes when it comes to the big questions.
Animals experience pain as a feedback mechanism within their brain to prevent them from taking certain actions. Pain is a logical consequence of natural selection. Animals that feel pain survive better. Sometimes that pain is totally unhelpful, and natural selection doesn't give a rat's ass. The reason is because generally pain helps animals survive to pass on genes. When an animal is suffering in death because of it, that doesn't affect the likelihood of procreation, so natural selection doesn't select it out. It would be nice, it would be VERY nice if we didn't feel any pain that we didn't need to. And with some medication we're able to do that. But natural selection didn't build it into us because it's not a benevolent god. Natural selection doesn't care about animal suffering needlessly, so animals suffer needlessly.
This is the "harsh reality" that you're avoiding with your benevolent god that has a reason for all suffering (but which you can't understand and don't know).
which is why faith is a crucial part of having a positive outlook amidst life's seemingly doom and gloom
This is going to come as a surprise to you, but it turns out that atheists are not all doom and gloom. We live happy lives.
You keep bringing up babies suffering as if there's something ultimately wrong with it (emotional reasoning) and that your viewpoint of it being somehow wrong is ultimately correct. Things are the way that they are, you may not like how some things are but reality is what it is. Reality doesn't need to change itself to please you or anyone else, reality simply is and it doesn't care about what little old you or me thinks of it opinion wise, this is the part you seem to be struggling to accept.
Actually I think it's you who are struggling to accept it.
Babies suffering is easy to explain in light of natural selection. It happens, and we should try to prevent it from happening because we understand what it feels like to suffer and know that we'd want someone to help us. We help people to prevent suffering because we're empathetic, not because we can't accept reality. Because we CAN accept reality and accept that we CAN do something about it.
None of this is problematic at all from an understanding perspective. It doesn't become problematic until you claim that a benevolent all powerful god needs babies to suffer. Then it becomes a problem. In short, this is not a problem until you introduce something like Christianity, and then it becomes a massive problem for Christians.
Faith comes from something deeper than the brain, it comes from a place within yourself that is beyond the limited scope of understanding or desire to control what can't and needn't be controlled.
It's emotional.
A while back I said that nuclear war was wrong, people here have said that human suffering is wrong, but which of us is right? The answer is neither I or they are right here because we're both coming from our own subjective viewpoints in each case.
Not all suffering is bad, but a lot of it is totally unnecessary and awful. So we should try to mitigate it out of empathy for those who suffer. WWJD
Any subjective viewpoint is ultimately flawed
You say that as though it is somehow objective.
Life dishes out exactly what each being needs according to the needs of their spiritual growth, I come to this conclusion because as I said reality has no mistakes and thus I conclude that everything that happens does so because it was always meant to happen for a greater spiritual purpose, otherwise it simply would not happen.
The idea that babies need to die a horrible death in early life in order to grow spiritually is laughable (and that's being kind). You throw your hands up not being able to explain it. Why does god need babies to suffer? You have no idea. But you just assume that it is needed.
Reality might not make something that can be considered a "mistake" when you understand the process that makes it. For example, our eyes are horribly arranged with blood vessels in FRONT of the vision and giant holes in our eyesight. It would be trivial to make a better eye than the one we have, but when you understand the process that made our imperfect eye (natural selection), you understand that none of the imperfections and flaws in our eyes were "mistakes". They came about because of a natural process.
But that's not the same thing as saying that we need to keep it that way. And it's for sure not compatible with the idea that we were directly created by an all-knowing creator. Because while natural selection might make an eye that seems stupid from our perspective, a God really shouldn't be doing that.
The same is true for the suffering of a dying animal. It's not a "mistake" because it arises through a natural process (natural selection). But it is pointless and unnecessary and keeping it that way is sadistic. It's not a problem from the perspective of natural selection, but it is a massive problem if an all-knowing creator designed it that way out of some kind of sadistic desire for suffering babies.
but to argue with reality as it is itself is totally futile
The only one arguing with reality is the religious person. The rest of us accept it and want to do what we can.
On what grounds should humans not have to experience suffering other than the grounds of your own human reasoning which tries to oppose how reality actually is?
On what grounds do you make any tool or plant any crop or kill anything or burn anything or move a single rock. Are you trying to oppose how reality actually is?
No. You're part of reality, and your ability to make changes is part of reality too, which means that your ability to mitigate suffering is part of reality, not opposed to it.
Notice how when you make such claims that humans shouldn't have to suffer you likely experience an inner emotional conflict of anger or resentment, that conflict is there to show you that your perception is not in alignment with how reality truly is.
You experience anger or resentment not out of a conflict with reality, but out of a part of your brain that motivates to you to act in response to stimulus. It has been honed by natural selection to make you do things without thinking about them, and sometimes it motivates you (all of us) to do stupid things. Anger especially does that a lot. Natural selection doesn't care if you do stupid things, if your anger overall results in you being more likely to pass on genes, it gets kept - stupid things and all.