An absence of shore entries would necessitate more boat diving, and therefore great choices of operators... at least in my mind.
That's an interesting theory.
When we first started going to Curacao it wasn't nearly as popular with US visitors and the diving wasn't as well known. The boat diving was more obvious, the shore diving options were either less developed, or less known to visitors, or probably both.
Curacao has changed over the years. A number of boat diving options have disappeared and I don't think entirely been replaced with new ones. Some old shore diving options disappeared too, but I think there's more replacing them. Cheaper and easier to have a shore diving only op if you can. There have been some new ops that do boats, including some small boatiquey ones like with the RIBs. What's missing now are dedicated dive resort options, on the water with a solid schedule of boat dives every day and and a nice house reef, full of folks who want to talk about fish too. But I don't think the change has as much to do with increasing shore diving, as with resorts going downhill due to lack of investment, getting sold to a company not so interested in the diving aspect, financial stuff, things happening with the real estate.
Kura Hulanda on the East end was not perfect but nice while it lasted. (Though of course Go West is still there and caters to the apartment type accommodations around there and people who drive out there for the good stuff.)
Sunset Waters, once popular with groups from dive shops, is long gone.
The dive ops at Coral Estate (former Habitat - pretty much now a generic resort geared to the Dutch market) have not been reliable as far as having a boat or regularly scheduled daily boat dives since the place got redone and reopened, and apparently has not had a boat running for awhile. Seems more like a general watersports operator that does some diving.
Seems Lions dive is still going strong, and there's Sunscape, sort of.
We prefer boat diving and have always found boat diving options to suit us there. We also prefer convenience, all the better if we can stroll from our room to the boat, or shore dive on site. We like relatively nice resorts but not super into AIs. We haven't been there in awhile, and I'm not sure where we would choose to stay if we did that would get us what we could at the old places. Lions Dive is OK, but the area is so busy now and I'd rather a smaller dive op - there's been times Ocean Encounters seems everywhere. Maybe the Marriott since they reopened and have a dive shop again, if they have a solid boat dive schedule but I'm not sure. Lots of new resorts, but I'm not sure if any really fill the "dive resort" niche.