Oh absolutely! Some big proponent of that I suspect is marketing (or the lack thereof). Secondary cause, likely training and comfort (in water) and utilizing or availability of a drysuit.
For tech divers, many have drysuits and travel heavy. Personally, I always bring by suit to Mexico and Florida without a second thought. So for them, the secondary issue isn't likely the cause.
Question for you: Although we are all familiar with the cold water locations you just mentioned, can you think of any of the attractions to those spots? For example: In Malta everybody know the Um El-Faroud Wreck, In Florida the Spiegle Grove, Oriskany, or N. FL for the caves, Mexico there is El Pit Cenote, California has Catalina Island, and so on, many of these landmark destinations for divers.
My curiosity also lies in wondering if Marketing can play a role in popularizing cold water destinations.