Hmmm...I'm not saying you're wrong, but when I pitted last weekend I know that I turned in much later than what is shown in your photo. So, it WILL let you enter the pit area even if you don't get on the apron as early as indicated. It's probably not wise to wait as late as I did to turn into the pits - I just didn't know where the heck the entry was!
Fortunately, there was no one right behind me, so I didn't slow anyone else down when I finally realized I needed to cut onto the apron quickly or risk missing the pit entrance.
It probably would be wise that everyone follow the pit entry "rule" that
@danbojte has just laid out because of the possibility of severely affecting someone else's lap if you wait until the last moment to turn in, like I did last week. I do agree with you, danbojte...everybody should practice that entrance to the pits. I know I will have to. I wonder why the game allowed me to enter the pits considering how late I turned in...I was honestly in between turns 3 & 4 before I started turning in.
As you can imagine, I had to get on the brakes fairly hard. I had slowed down a bit by getting off the gas, but had someone been behind me I would have really interfered with their driving and that's not cool...