Very interesting thread with a lot to think about.
Personally, I believe that the "Far West " days of scuba diving are numbered. In 50 years from now, most countries will require a Diving License, in exactly the same way as they currently require a driver's licence if you want to drive an automobile. The theoretical, practical and attitudes diving skills will be determined by the state, and scuba agencies will have to abide by these norms and standards, which will have become international. A state-run examination agency will determine objectively if a diver can be allowed to dive or not, and will either emit a permit, or fail the student.
The importance of crucial topics like task-loading, situational awareness, check-lists, detailed dive planning, proper trim and buoyancy skills, and other accident-prevention strategies, will be introduced to the students from day #1.
I look forward very much to this state of affairs.