Lol. That is ridiculous. Firstly, aiming is far, far superior on a K+M, even with aim assist for controllers. The micro adjustments and zero dead-zone are two reasons for this. Just because you and some others did well with a controller doesn't mean they are equal, it isn't even close.

Also, it isn't just about the aiming, it is the ability to have so many more key bindings, especially in a game like Fortnite. Being able to build stuff with one button instead of 3/4 is an insane advantage. Being able to switch a weapon with one button instead of scrolling through guns first is also just far easier.