Questions like this still tend to baffle me. Why is there such a strong desire to quantify everything into some sort of measurable, evaluative, "yes or no" categorization?
If you can do this, this, and this, you can do this dive. But, if you can only do this and this, you should only do this dive. I'm not sure how that works. And why people think it need be applied to diving.
People wander into the wilderness every day. Some climb mountains. Some simply meander virtual paved trails, enjoying the view. Holy smokes, some people run ultra-marathons through Death Valley. We trust that those who do not have the skills and/or desire will not opt for the more challenging risks, and, by and large, that is exactly what happens. Occasionally Darwin rears his head, but, mostly, people rise to their own comfort level. We don't measure and test everyone who enters a national forest, we trust human judgment.
Shouldn't safety and enjoyment be the only necessary "minimum proficiency" standards required? Oh, along with a healthy dose of common sense... which can't be trained anyway.
I guess that I just don't understand the need to quantify diving this way. It seems regulatory, even if it is done with the best of intentions (keeping someone safe). Left to themselves, the vast majority of people are surprisingly sensible.
Just my 2 cents.