How do you know Ueshiba didn't teach it? What if it was what made his Aikido what it was, but no one "got" that part of it? Does that mean it shouldn't be taught now?
I don't know, I said "if". But I'd have more confidence that O'Sensei, the creator of aikido, would pass aikido stuff down to Kiss. Ueshiba to Mor. Ueshiba, than somehow skills getting transmitted to some random Americans.