I agree with this completely. Look, I've owned just about every single iteration of the iPhone and I have never. I repeat, I have never - ever - sat on my phone or placed it in a position where it might have suffered damage (except for dropping it a few times, but that's a different issue). These phones are fine for the environments they were designed for.
Ah, and you never stumbled, you never jumped into an elevator you wanted to get, people never hit you in the bus and you never stopped because of unexpected children behavior.
You are living in an iPhone friendly environment