I've never seen a Bear hug,whilst your buddies hit thing anywhere out side of a movie, maybe it's an American thing.
I'm not. Disagreeing with your point, rather using it to illustrate mine.
Which is,
Scenarios, only include attacks for which there is some( at least theoretical) viable defence, attacks from behind tend toFall into the no viable defence category,Other than don't let people sneak up behind you. So get left out,
Those that do get included bearhugs( unlikely really) and choke holds are indefensible if the person has greater strength body weight that you and some idea of what they are doing, I got out of a choke hold once by kicking hard against a wall and knocking is both to the floor, he let go, if he hadn't I would still have been in a choke.
Scenarios that are included tend to be fantasy movies that are not realistically like life and give people false expectations of their abilities. but the running a self defense program and telling people there's no defence are not mutually compatable