I'm confused - what's so hard about playing FPS games on a console controller? Yes, it's not as responsive as a keyboard / mouse combo, but the console games are generally built around the controller concept so it balances out. Declaring them unplayable sounds like a bit of an exaggeration.
Don't get me wrong - I'm also a dominant PC gamer first and foremost (and I lean heavily into the sim market no less - I've got enough licensed DCS games and joysticks on my shelf to prove it) and I'd love to see games like Destiny come out on PC. But I also don't mind booting up my Xbox or PS3 every now and then for a fun romp through the singleplayer campaigns of Halo or the Metal Gear games just because I enjoy the production values, sci-fi storylines and co-op play (I don't really bother with the competitive multiplayer). A lot of console FPS games are hardly revolutionary, but games like Halo sell massive numbers for a good reason - I don't understand where the hate is coming from?
(I'm not trolling or trying to ruffle feathers, I'm just genuinely unclear on the line of logic)