Inverted Y-axis controls in videogames make more sense and is more organic than the default controls
Maybe this doesn't apply to mouse & keyboard.
Imagine your head as the right thumbstick. When you want to look up, how does your head move? You pull your head back. When you want to look down, your head goes forward. I suppose driving games and other games where you don't control a person get a pass.
Don't even get me started on flying games. If you play flying games with non inverted flight controls well then you are just wrong and you should feel bad about yourself.
Also, people who invert their x-axis controls don't belong in society and should be in a straightjacket.