My objection is that you can’t just be anything you say you are. In the case of sports, we aren’t talking about someone who is just deranged and thinks they are something they are not, wearing dresses or whatever else placates their illness. Their delusion directly and negatively affects the lives of others. Would it be ok for a boxer who believes he is a flyweight when he is really a heavyweight to compete in the flyweight division? I don’t care what he thinks he is, the scales don’t lie. What if I tell the SS agency that I am 70, when in fact I am not? Can I collect full SS if I truly believe that I am 70? Any amount of logic applied to the situation yields the same result. It is a delusion and those suffering from delusions have a mental illness.