Then maybe you should reconsider your choice of professional careers if that's a risk factor and your risk tolerance isn't high enough.

Imagine this response in the context of a sport like the NBA. If the ref is secretly racist and bans you from the sport because it's "funny" as their excuse, would you react this way? The nature of videogames doesn't make the professional sport of them juvenile and less worthy of rigorous standards for inclusion.

The NBA is an organization who's job it is to set rules that teams, athletes, and referees can participate in. They can choose to fire refs who behave this way, and they would because they make more money if the refs aren't racists (especially now that they're getting more into racial activism)

Twitch is basically the NBA of their streaming platform, as in they set rules for how streamers, viewers, and moderators interact. Twitch can create whatever arbitrary rules it wants to maximize their revenue. If advertisers stopped caring about controversy, or if Twitch suddenly found a better revenue source, they would surely pursue it.

The irony of your comment is that once upon a time, these professional sports leagues made more money by being actively racist and excluding people of color from their leagues lest they upset their white fan base.

I don't know how long ago "once upon a time is" but they seem to have increasing revenue very successfully since the 80s at the least based on some googling. Maybe before then, but I don't know if we can find any data to support that.

Your analogy is wrong, and so was mine. It is not the refs banning players, it would be the television sports broadcasters. Makes even less sense.