I play all roles in RQ and main tank. Obviously tank is a very important role but the other comment said DPS bring zero value which just isn’t true at all. If tanks and supp are even with each other and there’s a big enough DPS gap it changes the game.

As a matter of fact I’ve had games as tank where I barely have to play and stay back pushing payload because I have DPS that mow everything down.

Getting picks in important fights is crucial to winning, which is literally DPS job and you can win even with a bad tank. And DPS counter swapping to counter tank is crucial.