I agree with sonny. It's not like Mark Selby to "pretend" an injury for the sake of playing mind games and it is something that would affect anyone's confidence. Even if he feels no discomfort, the awareness is there somewhere in a corner of his brain and he can't be as carefree and fully concentrating as he was before. This kind of trauma might take years to disappear completely. Also he will not trust himself to take certain positions in fear it could come back.
I think the interview was quite honest, and clearly, with his confidence low, he admits again that he tends to play in a rather conservative way (there … I avoided the word that would get me stick from the boss
). Players obviously have to play the way they feel it. I have already expressed the opinion that I'm not sure that this is the approach that will help him to fulfill his potential, but then this is just an opinion .