I'm gonna take a step back to when I was last here, because I think it would be most helpful to answer the post
Goshin2568 addressed to me. Hopefully he'll get an answer that satisfies him.
Because I drive a car in real life; sometimes irresponsibly, to be honest. Because I've spent years playing (better) sims with a wheel and honing my skills. Because I have enough experience playing sims that I can analyze a car's behavior based on visuals and audio alone -- suspension movement, angular momentum, tire noise, changes in RPM, etc. Because I've spent hours discussing this stuff with
Scaff and other GTPlanet members, helping to sort out the misconceptions/flaws from the realities (and like he said, we didn't care how you played the game).
Yes, I have experience beyond playing with a gamepad. Yes, someone who has never done anything except play console games with a gamepad would probably be worse off than me on a real track. But you wanted to know why a gamepad user would be concerned with physics. I'm a gamepad user, and I care about physics.
I think realism is fun.
I enjoy arcade racing games too, but I really enjoy realistic physics. There are no artificial limitations, no frustratingly unrealistic quirks, no ridiculous exploits...or at least fewer of those things.
I know what to expect of each car, and what they should be capable of. I know when I've made a mistake, what it was, and how to do better. I generally know what the tires are capable of. I know that when I succeed, I've done it on my own, instead of simply gunning it down every straight, drifting corners on rails with generic inputs, and hoping those rails don't carry me into an obstacle because I'm helpless to truly affect my course (I'm looking at you, NFS: Hot Pursuit).
In some respects, Forza 4 is not my type of game. I don't particularly like driving racecars, especially modern ones. I prefer the open road to the confines of a track. I don't like fiddling with tuning settings. I'd rather drive a stock car than a heavily modified one. Most of my virtual cars are a solid color. I don't even have Xbox Live Gold, and my 360 spends over 95% of its time disconnected from the internet.
I play Forza 4 for the physics. It's not perfect, but it's pretty realistic, and I know that because I have experience. My Logitech wheel is incompatible, but I don't care and play with a gamepad because it's fun.