How is that different in comparison to any other retail/training/service industry?There are horrible classes (most of them, in my opinion) and there are excellent classes. The only problem is letting consumers know the difference.
Agreed, A competent and caring instructor can make you/me/anyone a better diver, if they make the effort.You can't make anyone a better diver unless they WANT to be a better diver!
However, they need to know that they need more help first. All to often, many OW divers just muddle along on vacation, overweighted, following some twenty-something DM looking at the pretty fisheys for 30 minutes with nary a clue about trim, buoyancy, kicking techniques or navigation.