That's because they're making the same game as consoles for most of the aaa software that we see. By continuing to perpetuate dual analog pads as the go-to for shooters, you're relegating level and enemy design, among other things, to yet another generation of stagnation. Move was a good thing. It should have been bundled.
Except there was a time not so long ago when PC had many exclusive FPS games, and their level design and enemy placement was nothing special compared to today either.
People want big dumb shooters to play with friends. Even if you have a more sensitive and faster input device, that will not change. Consumer taste dictates game design more than technology in this instance.