I don't see how political correctness has anything to do with it. We're talking about self image here.What's politically correct about not beating ones self over the head with all kinds of negative internal dialog?
When you're actually there, it's not negative at all. Also, pretty much everybody in the room does actually suck at what's being taught - if not, then no need to be there.
To follow up on what Dan mentioned - it is
pretty unique, and it's enormously refreshing, to get out of the little budo boxes that most people put themselves in.