As a fighter and one who has pissed hot before this is not a personal issue at all and to say it is shows he is trying to fudge the issue. He is a man who was huge at 20 and clearly cheated as he was caught doing so.
All round physical performance has everything to do with how well you can execute that technique though.
He is not being singled out unfairly, one he has been caught using PED's, two all TRT users have a huge amount of threads talking about their TRT use when they fight or do interviews about TRT.
Normal levels for a 20 year old not a guy in his mid to late 30's or into their 40's for Hendo. I'd have no problem with a guy taking TRT to get back to the average level for their actual age group.
You also have the problem that they only have to pass a piss test come fight time and not during their training.
You have only Belfort and a doctor who works for an organisation set up by the UFC word to go by, no single independent organisation has been involved. The fact he won't even risk applying for TRT exemption in the US shows he is dodgy.
If TRT is so harmless why is it so difficult to get a pass for other sports? The Olympic committee has thousands of athletes world wide yet only ever gave out two passes and one was for a guy who had lost both testicles.