ronbeau
Contributor
It isn't at all. I'm sure some folks with that title are exactly what you would expect from your definition, but the title is no guarantee that they even have a fairly good grasp of buoyancy control, no guarantee that they don't dive while flailing their hands around all the time. The title means very little, it means they have logged at least 50 dives (unless they bought the card prior to that requirement being added), it means they have 5 specialties in addition to a Rescue certification (unless they bought the card prior to that requirement being added). It means nothing else. It certainly does not mean that they've reached the pinnacle of non-professional, non-technical diving.
While I do not disagree with the majority of your post, I believe the 5 specialties you are referring to is for the PADI Master Diver certification.
For NAUI, it is a separate course and a written exam that is a prerequisite for people crossing over to the NAUI divemaster program.
I cannot comment on any other agencies, since I am only familiar with the NAUI and PADI curricula.