Pro X shoots Y way. If Pro X puts out a book with detailed information on how they shoot, is that a bad thing, even if it doesn't work for Player Z? I don't think so. In Pro X's mind this is the best way, and is workable for some players if they put the time in. Is it worth pursuing? Only Player Z knows this for sure. I'm pretty sure every pool author ever that tries to teach their method is guilty of this. The real proof is if it works for some people, not all people or every style player there is. Some players will be like ducks to water to method Y, others will not. The method may never work for Player Z, but it might be the cat's meow for Player W.
I see the potential but at this point I'd rather put work into fundamentals than learning an exotic aiming system. I've missed more shots in my pool "career" from bad fundamentals or speed control than from faulty aim.