I believe that while your first sentence may be true, the second does not follow logically from the first. It may be that
neither teaching tables by NAUI/PADI works nor does relying on dive computers. There are other possibilities, including:
- Some people may not be ready or motivated to learn what they need to know to be safe divers regardless of who teaches them.
- There may be a better way to teach tables than NAUI/PADI use. For example, it may be that the curriculum is sufficient but their selection of instructors is poor or their business model pressures instructors to push people through the system as quickly as possible.
- There may be a better way to determine safe dive profiles than tables that makes a diver safer.
I personally think all of the above are true for some segment of the diving population. A small number of people just want their certification so they can have fun on their vacation. Giving them a computer doesn't make them any safer because they will either do whatever their DM tells them to do, ignoring the computer, or do whatever they want to do, ignoring the computer.
I have witnesses the certification mill at work, it is not pretty. There is good information in the OW process, but some instructors don't want to answer your questions, they just want to push you through the system because they make money of trips and equipment sales, the instruction is a loss leader to get you in the door.
And while I am not a computer hater, I believe my study of the models behind the computers and planning programs makes me a safer diver.
Not trying to pick a fight here, just pointing out that it isn't a simple Door Number One or Door Number Two. take me for instance. If I am not a safe diver with tables, I would not assume that strapping a computer on my arm will fix the issue...