Calling it a dead subject insinuates that people have talked about it enough, so people who haven't talked about it shouldn't. This forum gets new users all the time. People who like to debate find someone else to debate the topic with. Again, if you have talked about it enough, go talk about something else, especially if the only thing you have to contribute is, "other people have talked about this before."
I think the real problem isn't that people are talking about it. It's that some people have a different opinion than those of you who don't want it talked about anymore, or are willing to entertain that trans women shouldn't compete against biological women. You don't want to hear it anymore, so you complain about the topic. If this thread were, "Trans woman successfully competes against biological woman and everyone is okay with it." you'd have no problem with people discussing the athlete's physical attributes and talking about her right to compete.
I think the real problem isn't that people are talking about it. It's that some people have a different opinion than those of you who don't want it talked about anymore, or are willing to entertain that trans women shouldn't compete against biological women. You don't want to hear it anymore, so you complain about the topic. If this thread were, "Trans woman successfully competes against biological woman and everyone is okay with it." you'd have no problem with people discussing the athlete's physical attributes and talking about her right to compete.