On the one hand, there's common sense. On the other, there is a combination of gullibility and hope. Why wouldn't an entrepreneurial type make a buck where he could by teaching something that isn't teachable? This is reward without risk, unlike gambling. Not that there are three hands, but it goes without saying, and we have all seen it, that some people shoot better than others. In fact, the "results" some show with decent consistency are in my mind the best way to sell a skill one might have. Good luck convincing all potential clients. No one shoots that well.