not enough money in it
Still, PC gamers are just happy getting the best versions of everything (well, most of the time. Fuck you 2K Marin!)
The tech and visual package is part of the overall "experience." It's absolutely impossible to disconnect. Only people dishonest with themselves try to disconnect it.
I was extremely impressed by Uncharted 2 and games like God of War and Gran Turismo 5, even though it's not up to my "exacting" specifications. As I've said before, I've come to learn to deal with 30fps even though it's factually inferior.
I am not, however, unfair to developers. Anything consistently under 30fps is not acceptable, nor is anything that is at sub-HD resolutions at this point in the generation. I don't care what a developer had to do to create their product - I'm not here to hold their dick and pacify them with pleasantries.