Since I have taken my 1st plunge a few years ago; I have heard this argument mainly about PADI vs NAUI but not excluding other agencies. I can only speak to PADI because I don`t have any 1st hand experience with any other agencies.
I look at diving and all of the various agencies!!! Are some better than others...I don`t think so because there are pro`s and con`s to all of the agencies.
They might stress some things and have a way of instructing that might differ from the others but the bottome line is they are hopefully promoting safe diving but they are going about it in various ways.
I Think what is more important in than the way something is taught is that the teacher is not only qualified to instruct but have an apptitude for instruction and is promoting diving in a light that knows no agency but is good for the sport of SCUBA diving.
We adapt our teaching in minor ways to suit the individual, the agencies are doing the same but doing it on a much larger scale.
Usually when there is a rap against an agency; it`s usually a person associated with the agency that is casting a bad light.
Are people perfect, NO. So why do we expect organizations that are made up of people to be perfect?
I am not suggesting that when an agency has an unsafe standard that it shouldn`t be talked about, but I don`t believe that if an agency is truely promoting unsafe teachings that that will last in the long haul.
Do organzations bring up good divers...well they do give them the tools and the knowledge to be good divers but it comes down to the free will of the diver if they are going dive safely; not the oranizations.
Happy and Safe Diving