As someone who spent a number of years knee (or hip) deep in the freshwater side of the hobby, I think this is probably a good idea.
Just because a species is available in the wild does not mean that wholesalers should net most of the natural population, move them to their holding tanks and drop ship them to every retail establishment in the world.
It makes me cringe when I see freshwater rays for sale in a LFS and hearing Joe Bob Hobbyist asking the "oh so helpful" clerk if he can keep a Motoro ray in 55 with his large cichlids. (this species gets up to around 36").
Reading this doc, reading between the lines, it looks like they want collectors / wholesalers to have a permit and the correct equipment, stay out of the preservation areas, and don't collect fish that nobody has any business keeping in your average home reef aquarium (many sharks and rays). One could interpret that paying for the correct permit / license would give the government money to spend on preservation (but yeah, we all know how that works out sometimes).
Looking at the white list, there's a lot of smaller fish on that list (wrasses, etc.) but they're putting some limits on collecting yellow tangs. It also looks like they're limiting collection of corals in the reserve areas which is also a good thing in my opinion.
Reefkeeping is NOT the same as freshwater, I think the species are even more delicate and keeping a healthy environment requires a lot more work / research.
I'm not sure if something like this exists in the saltwater / reefkeeping world, but if Hawaii could set up something like
Project Piaba, that would be of some benefit.