I don't give a shit about numbers
cait has 650 range and cannot lose a lane
Now that I'm looking at your arguments, they're totally true, but they're only true in EARLY game.
"Cannot lose a lane" : True, that's the whole point of Cait, but she doesn't scale well in late game, so it's kinda fair. I agree it's annoying to play against but Caitlyn is kinda bad without her range. Her utility is god like in early phase : High damage poke which goes through enemies, traps to stun enemies and prevent ganks, net to escape pretty much ever gank, ult that can kill any low health enemy under their turret.
However, NONE of those ability scale in late game (except her passive), and by scaling, I mean multiply the effectiveness of your items, which is also known as steroids. When Caitlyn buys a BT, it will do 100 more damage (charged) and that's it. However, Tristana, Graves,... can get it to do 180 more damage (80% AS), which means that buying the same item gives nearly 2x more effectiveness for an other AD Carry. That's why Cait's late game is bad.
We are NOT saying that Caitlyn can't do anything in late game, she is still a carry, we are just saying that a lot of AD Carries can do better with the same items and score in late game. That's why Cait HAS to kill and farm early.
Why do you think Cait isn't first ban/first pick in tournament plays if her late game is as good as any other AD carry in late game, considering she already has the best early ? (I'm not saying she isn't picked, I'm saying she is not the BEST OF THE BEST choice)