How is possible that you can say that this deficiency exists, is so simple to correct yet not call the Instructor lazy? Perhaps Lazy is the wrong term. Perhaps "rushing them out the door so they can get more money through" is a better term. If all it takes is an extra hour or two to correct some fo this, how is this not the Instructor's fault?
I can't answer that question. I obviously don't know under what circumstances their training took place. What I do know is that *if* the instructor wishes to produce students who do not scull with their hands (or very minimally) and show good buddy contact, and reasonably good propulsion that it's easily integrated into the OW course. It's more a matter of approach, or maybe necessity, than motivation.
I am absolutely positive of this because our local conditions require a different diving style than what I'm seeing here and I spend time on these things. In fact, getting results on this front is largely a question of simply making them aware of the issues and having clear achievable expectations.
Does that mean that people who don't do this are lazy? I don't know. That's your interpretation and you're also willing to fill in their motivations for them too. I don't know what motivates anyone other than myself.
R..