So you don’t care of what pronouns they choose? You literally don’t know them irl, you would have 0 information of what their gender is to call them anything but “they” if they don’t put their pronouns. Assuming everyone is a man is unhelpful nowadays.
Even if you were a right winger immersed so far in the culture war you are unable to recognize the idea of gender as separate from sex and thus denying people determining their own pronouns, you still wouldn’t know what someone is. But if that is frankly your position it would be better you stay away from that place since you would be exactly the kind of people they have to moderate so heavily against