Wheww, Chris, you need to chill a little.
While I do have a DIR-F card,
I choose not to go full DIR. It's just not necessary for the diving I do. I prefer my BC to a BP and like using my computer, nothing wrong with either, rather its a matter of personal preference.
I found a lot of things I really liked about GUE training and some things I did not care for. I have picked and chose the items that made sense to me and incorporated them into my diving style. I do think the name "doing it right" leaves something to be desired,
doing it standard may be better. DIR is as much about being standard as anything. I will say the skills traing part of the DIR-F course is likely the best going and was the part of the class I found most useful. There is nothing "wrong" with a BC or not diving a long hose config, it's just different, in the right situations either are perfectly safe. Safe competent divers come geared in all sorts of ways. I would bet its rare a REAL DIR diver would refuse to dive with someone simply because they are not DIR as long as the dive did not dictate otherwise, internet wannabes are a different matter. Unsafe or careless divers are a totally different matter. Frankly, I would not dive with someone with that attitude, DIR or not, way to macho to be a safe diver.
Diving is not an absolute sport, many divers and locations do things differently, often dictated by local conditions. Your mention of no snorkels is a good example. Tech divers (and DIR trained divers) dont normally carry snorkels for good reasons. I never dive with one unless required by the boat and then its stowed away and not on my mask. DMs are another example, here in NC we never have DMs in the water except for training dives. You hit the water with your buddy and go, we assume you are a real diver and know what you are doing. Oking on the surface waste time, with waves and currents we have you stand a lot better chance of getting swept away from the anchor line.
My honest opinion is,
chill out some, find several good experienced buddies and spend some time diving and learn from them. Learn what works for you and then if you want to go full DIR, have at it.
To you last questions, why would you want or need a
dry suit in the Caribbean? ...
Enjoy the warm water and diving freedom of no exposure suits, just pee away.