In a general sense, I'd have to say yes. However, because of the hunting regulations in most, if not, all African countries, having a PH along is a prerequisite to hunting, (unless the client is a resident of the country), even if the client is adequately armed.

IMO, I doubt that most hunters who try these stunt hunts would do so if there wasn't an adequately armed PH around to cover their butt in case something went terribly wrong.