You might ask how the hell did Egan win the Blue belt division in Brazil. Having not seen his fights, I can only guess. The man is pure muscle. With even a scintilla of technique and his overwhelming strength he would crush most people. He is a naturally gifted athlete.
Naturals often make the worst teachers.
If asked, they are often hard pressed to explain how a move is done. Because of their gifted nature they simply execute the move with out thinking about it. See how much you learn. These tapes are not for beginners. The techniques are taught only superficially and assume a clueless opponent.