the rules of competitive is to play to the best of your ability and knowledge to win a game
by not swapping to zarya (or mirroring orisa) when the enemy tank goes orisa (if you are aware that zarya/orisa/sometimes dva is the counter), you are not playing to the best of your ability.
This is a fucking absurd take. Idk if you’re throwing by not switching but you 100% would if you switch to a character you can’t play just because someone on the internet said they counter the opponent tank. This game isn’t rock paper scissors, you can’t just pick a character and expect it to beat the other tank without even trying. Do you actually know how many times I have died to a good Dva as Zarya? Do you know how I absolutely murdered a Orisa as Sigma and all she could do was try and dent me with spin and run into my rocks?