There already are different rules for stakes vs blinds, e.g., 3 hunters vs 2 hunters, and different rules for "A" and "B" Zones, but so what? The "slippery slope" arguments is just a way of trying to avoid making changes.
Sure, there are other places to hunt divers at Long Point, but that's irrelevant to whether or not the LPWMA should attempt to improve the hunting opportunities for diver hunters. Allowing hunters to hunt farther from the stake / vegetation would be a simple way to do that and it would not affect the marsh hunters and wouldn't be a liability issue, either.
Instead of thinking about why it "won't work", try thinking about how to make it work.