Horse pucky! If a person needs that much supervision at the end of the OW class then they should never have left the pool. The other issue is I've seen instructors and DM's I would not dive with let alone allow someone I cared about dive with them. The goal of OW certification is to train a person to dive independently with a buddy of equal skill and training in conditions similar to those in which they trained. With no professional present. The divers should be able to fully plan, execute, and safely return from a dive.
IN fact they should be able to return to the site where they did their checkouts the next week and with no outside assistance dive that site. If they can't then they need to look at how they learned and what the instructor neglected to pass on to them. Or they need to go over their class notes and see what they missed or ignored. Sometimes students mess up and do not take the training seriously.
They buy the BS line that OW diving within recreational limits is the safest thing in the world. They don't realize or care that they can die in minutes or even seconds by ignoring a critical aspect of the training. By the same token some instructors give the impression that there is very little risk. While they may go over the risks they do so in a ligthhearted manner or do not convey just exactly what happens when you pop a lung.
I have seen and heard instructors tell students "don't worry about this or that because you will have a DM in the water with you." Or so and so puts a DM in on every dive. They don't tell them that people have died by blindly following a DM or Guide. Not good for business. The only person responsible for keeping you safe is you. The sooner this gets into more peoples heads the sooner a number of problems will go away.
I think we are arguing the same point from two different perspectives. It sounds like you think OW should be more intense so that divers are capable of safely diving independently, while I am saying that OW is not intense enough to ensure students safely diving independently and so they should take more classes.
or perhaps you are saying that OW is set up right, just some instructors are too easy.