You heard of ranked warzones? You will use your brain more in one ranked match than a weeks worth of fps and ops.
Gear should always matter no matter what you do.
What does how much you use your brain have to do with bolster and gear? This goes back to you wouldn't want a person in full pve gear on your team in ranked against a team in full conq would you? But in a normal warzone itdoesn't matter. Same goes for story mode ops and hm fp
The post above me says the same thing.