Your advice is "allow people who harass youto enjoy a game however they want, but restrict your own actions as to not become a target of their harassment."
That is terrible advice. Full stop. It solves nothing about the problem. I get what you're saying: it alleviates the symptoms of the problem by reducing the harm you to which you subject yourself. But why wouldn't we, as a community, want to just snuff the problem out completely instead of treating the symptoms?
You say we can't, but I completely disagree and I think there's demonstrable ways to reduce toxicity by condemning it publicly and universally. People do it because they get away with it and nobody does anything about it in an immediate sense. In the case of an OW, there are 4 other teammates there who, when the culture positively reinforces that if they join in on the harassment there are no consequences and they will be part of the "in-group", they will. But if everyone there is ready and able to shut that shit down and the culture shifts from "there's nothing we can do about harassment" to "stop fucking harassing people, you hormonal teenage shit", then these kids and this toxic behavior makes way for more productive attitudes and behavior.
Does it happen overnight? No. But asking people who are relentlessly harassed to just be quiet and ignore their harassers without any recourse is sending the message to these toxic-ass kids who are learning about the world through this behavior that, yes, they can do whatever they want to anyone they want and there are no consequences. If we do nothing, online games become a place to catalyze misogynists, racists, and sociopaths. I refuse to accept that as the answer to this problem.