So if people who are marginalized go on Twitter to complain about it, their reports don't count? Perhaps some 'powerful, privileged, unaccountable' people do exploit this cause for their own selfish ends, but it seems to me that your argument is predicated on the idea that marginalized people are incapable of asserting any agency, and if they try to do so they must not really be marginalized. I think you should re-evaluate your premise here.