I'm sure it also depends on the definition of "Vacation Only" divers. If we're talking about someone who dives only a couple of times while on their annual vacation, and really doesn't worry about practicing skills in between dive trips, then it's only to be expected that they're going to dive like perma-noobs.
My wife and I probably count as "Vacation Only" divers, in that the nearest diving is at least a weekend getaway trip away. We don't live someplace where we can just decide to go dive on a nice afternoon after work. The Sea of Cortez is about a five hour drive, and the Pacific Ocean is about an eight hour drive. We don't even have a quarry for diving in the Tucson area.
On the other hand, when we go on a dive trip, we'll get as much diving in as we can, and spend some time on each trip revisiting and honing some of the basic skills, lest we forget them or get complacent about them. Yeah, I'm still basically a n00b, but that doesn't mean I have to resign myself to staying one.
It doesn't hurt my feelings at all, though, that we've gotten to do pretty much all our dives in warm water. We're planning another trip to Mexico next month, and I suppose I really should try diving in my 3 mil wetsuit at least once on this trip, just so that I get the feel of the difference a wetsuit makes in the experience. So far, though, all our dives in Mexico and Fiji have been in warm enough water that we felt comfortable in just the rashguards.
I didn't really understand so many of the other divers on our trip in Fiji, wearing wetsuits every day. Even down at 80', the water was a pleasant temperature, and I'm not the kind of person that does well with cold.