Are you a rebreather diver yourself? It doesn't appear so from your posts and also your profile, but maybe it is not updated. If not, using your logic, how are you able to determine if rebreather divers are adequately trained given you do not dive one yourself?
I don't think people need to be diving a piece of equipment to determine if others are skilled or not...
Try not to take this so personally. I definitely think that there are more difficult places around the world to learn to dive and what is the big deal if there are and that you didn't learn there? Locally I deal with coldish water, strong currents, swell and seas, sometimes awful viz and in comparison to some of the northern states I think conditions are tougher to dive in most of the time. But that doesn't mean that I think divers from up north are inferior divers or what not, just that it is easier to dive up there. I am quite sure there are plenty of more challenging places in the world to dive than were I'm from too, but I don't take it personally when someone points that out *shrugs*