So the only point that you're really making is that cross platform competition wouldn't work.
That wasn't my point at all. If we continue this conversation, I think it may become an argument, so this will be my last response to you in this thread.

PCs have better controls, higher skill ceiling, and higher level competition so if you want that go with PC.
Gonna go ahead and call shenanigans on that. First one is opinion, second and third are BS.
He's logically correct. The mouse uses a 1:1 control scheme, that is optimal in any FPS that uses a 2D pane for aiming (That's what FPS games use.). The "higher skill ceiling" he's referring to is a direct result of this when comparing it to how controller players aim. Consoles use an anolog joystick, the state of which dictates the direction and speed your aiming reticule will move. Using a joystick to aim the same way as a mouse would require much more precision and prediction. In essence, you have to do a lot more to get the same results, and often, that "a lot more" is unachievable due to the limitations of our reflexes, motor control, and game constraints like restricting precision/sensitivity issues. There are ways to reduce these difficulties though, you can buy joystick pads, that lengthen the apparatus, making fine control easier.
As for higher competition, better control allows players to bring as much of their talent as possible into the game, which allows for a higher level of competition. Basically, more control and talent allows for higher depth of play.
I think the problem with this conversation is people are starting to let their personal preferences, and emotions come into the mix. This is clouding judgement, and detracting from an objective and rational comprehension of what is being said. Lets be open to the possibility of either being wrong, or possibly uninformed.