Thinking that PC games are limited to the top releases on Metacritic is ignoring literally all the value PCs bring to gaming. There is a massive long tail of games that aren't on that list but are very popular PC games nonetheless.
If I played with a controller exclusively, I'd have to give up Cities: Skylines. I'd have to give up Guild Wars 2 and World of Warcraft. I'd have to give up Civilization. I'd have to give up Factorio. I'd have to give up Crusader Kings and Europa Universalis. There's no way I'd be able to map all of the controls of BeamNG Drive or Euro Truck Simulator to an Xbox controller.
That's a lot of sacrifices being made. After all that, what's the point in having a gaming PC anymore? And that's not counting that eventually you'll have to plug in a mouse and keyboard to do Windows Updates or something else that the OS will make you do that isn't controller compatible. Might as well just keep them plugged in, no?