He is absolutely correct. NOW, he just needs to do it himself & follow his own advice. MB his thumb blister on his pad will go away & his scores & consistency will improve, make a few cuts & cash!!!

Good video. 

I always remember a suggestion that I learned many years ago. That suggestion has the bowler imagine that instead of a bowling ball, imagine that he instead, is holding a small bird in his hand. He wants to use just enough grip pressure
to prevent the bird from flying away, but not too much pressure that will injure the bird.

This little tip has served me well over the years.