Transphobia is a property of actions, not an immutable property of people. Rogan may not hold transphobic beliefs. That does not stop a particular action from being harmful.

This isn't a judgement on his person. I don't want to shoot him into space. I want people to recognize that this specific sentence is harmful and we can be better than that. We can have conversations around transgender people in sports without using the same exact same phrasing as people who want to kick them out of their homes and call them freaks.