I was disagreeing with your premise that he isn't as likely to be able to help very advanced level players. I'm saying those the types of players he's most likely to help the most!
Never said that either. He's as likely to help advanced players just like many other instructors. Not disagreeing with that at all. I'm really disagreeing with the "champions" part. Most folks seeking lessons, all 99.9% are not trying to become champions, nor could they if they wanted to. So, it gets a little delusional when we talk about folks need to seek "champions" to learn to shoot better.
This is not a knock on him at all. He's great. It's a knock on the statement. And i've trained with my share of champions and lovd every minute of it. From Earl, to Nick, to Archer, to Appleton, to Buddy, etc. Going to a seminar with Thorsten at the end of the month. For straight pool and I don't even play straight pool.