ALL horses are looking for a leader. But the difference is if a RB finds one then they follow no questions asked, nothing they have a leader that leads and that good.
LB horses on the other hand are looking for a leader, once they find one though they challenge them see if they are 'worthy' (for lack of a better word) to lead them. They see if they can lead them, they need someone who can lead them and guess what? They challenge that leadership every step of the way to make sure that their leader is still doing it right. So maybe your horse is not saying "Make me!" Maybe he is saying "CAN you make me? CAN you lead me?"
Just a thought. And no sometimes you have to make a horse do something to keep them safe and that is not against the PNH method.
Am I a 'student' no, do I use the method? Yes I agree with all of it? Nope. I keep an open mind and no horse is in a box (LBI<LBE<RBE<RBI) I just go with what the horse needs.