His views on the topic lack nuance. First, you need to determine that the presence of male-to-female trans athletes is indeed a significant problem in a given discipline. Then, we as a society have to decide whether or not we want to do something about it, which is not necessarily a given. For example, are you aware that the top 30 male marathon runners are
all from Kenya and Ethiopia? It sucks for Europeans that we apparently just can't compete at the highest level, but most people would probably argue that this is just the way it is. Finally, the actions that should be taken will depend on the sport in question.
Case in point: Rogan talks a lot about fighting. But in that particular case, we already discriminate by weight. So it might be possible to make things more fair by giving a weight penalty to male-to-female fighters that want to compete in the women's league.