That is true, they most likely do not NEED to know BS, but it's just one of those things where I feel if someone is incapable or unwilling to learn then that's not someone I want handling money.
The other thing I wouldn't be OK with is ploppy mentality. If someone takes a 10 on a bad hit, the dealer flips over 16 and draws a 5, and you want to say something about taking the bust card (unless it's strictly part of an act), then I don't want anything to do with that person. That to me is a sign that someone can't be trusted. I know if I had a GBP make any kind of hunch play I would probably explode at the table and blow any cover we had. Misreads and mistakes are one thing, but doing something "because you had a feeling (unless that "feeling" was because you saw a hole card)" would make me lose it.