Then they should look at how they live. And not at how they throw a ball as the defining thing for them to cheer over.
In other words: most of the time, fans of famous sports players seem to care more about how well they play versus how they live their life.
Sure, Star Trek is fictional and should be put in perspective as a piece of fiction, but it at least teaches us about positive morals and lessons in life. It also makes us think about how things could be if we were to imagine greater. It even engages our minds in the scientific possibilities of life, too.