<Begin Thread Derail Rant>
As far as standards go, this sport (as a commercial entity) is very new and constantly evolving. I expect that 30 years from now, certification standards will be as different as they were 30 years ago. It's an exciting privilege to watch it all unfold. For now, though, it seems to me that the system as-is is fine. To the extent that training standards have attenuated, conditions have become more controlled. New divers these days dive under the supervision of divemasters (on vacations/boats) or more experienced community members (locally), and many new divers seem perfectly content with that. Those that aren't do what it takes to grow out of that paradigm.
This sort of system yields two types of divers:
(1) those that want to occasionally go underwater and relax, see pretty things, and feel good without doing much work
(2) those that are drawn deeper (no pun intended), and make the effort to grow into a greater level of self-sufficiency (not necessarily solo, but enough independence to safely buddy dive without a divemaster, or lead a newer diver)
There's really no way to shortcut mentoring for those that are serious about diving. The only question is whether the decision to grow and the choice of a mentor are in the hands of the individual diver, or dictated through an agency's standards. My opinion: give me access to rentals and fills (OW card), and let me decide where/how much I want to grow.
Currently, it seems that the economics of the current paradigm are sustainable. Despite all the noise about inadequate training, fatality/incident statistics seem to indicate that this sport, with its current training standards, is relatively safe. If both of those factors indicate stability, why narrow the field by introducing more restrictive standards and depth of training? Not only would this result in less money going into the industry, it would limit the number of people who choose to experience the beauty of our underwater world. That makes no sense to me.
<End Thread Derail Rant>