Honestly, all of them are like that though. Samuel David is saying that Jack Grayle casts glamors, does binding spells, and deflects whistleblowers - and I really feel like this describes 99% of occult teachers and definitely the influencers!
So Jack Grayle is a garden variety control freak. Big deal, the real question should be - how do you notice when a teacher is like this, and are you willing to deal with his domination magic in order to take his classes, just because his classes are good? (Sometimes that risk is okay - I have dealt with teachers who were psychically attacking students, and I knew it, because they had valuable knowledge that I had no other way of learning.)
Literally ALL of them do this stuff though, it's not just Jack Grayle. The teachers who don't cast magic on students are the teachers who left public teaching and the public spiritual community. They have small, intimate covens built on trust, reciprocity, and shared values, they never advertise, and they'll never become famous.