There are probably 1000 "normal" golf swings for every one that is goofy like Furyks on (or was on) the golf tour. So, is it in your opinion, that fundamentals shouldn't be taught for the 999 because there's 1 person whom it's not correct for?
Of course there isn't a correct set of fundamentals for 100% of people, but the idea that it can't be useful for a vast majority is incorrect, IMO.
Furyk's "goofy" golf swing will make him more money in a year than you'll see in a lifetime.
Fundamentals (basic pool play) does not have to be taught by an instructor to anyone. No one that I play with has ever had an hours worth of structured instruction, and we are all good players. Likewise, the two pro level players in my area did not start their careers with lessons. Their lessons came from watching, doing, and endless hours in a pool hall.
If you feel that the only way for you to get on the fast track to playing pool is to spend money on pool lessons, then be my guest. The only problem is there is no fast track.