Oh, you have GOT to be kidding. You clearly have never spent any time talking to a GUE instructor, or listening to a GUE class. A tremendous amount of time is spent explaining various approaches to things, identify the GUE approach, and explaining WHY it was chosen. It's as far from indoctrination as I can imagine . . . people are actively encouraged to ask questions and to question the gear, the procedures, the protocols, the gases, the deco, and on and on. The fact that people adopt the system whole-hog and then get evangelical about it just speaks to the extent to which the explanations are convincing, and the power of seeing it work, over and over again, in a wide variety of settings.
You may not LIKE the DIR agencies. That's your privilege, and if you don't want to recognize their cards, more power to you. But the divers who have earned those cards would be some of the easiest people to dive with that you could encounter. Everywhere I have gone where dive boats have the experience of GUE groups, they love them. Avid, safety-conscious divers, competent, and no drama. They follow rules.
What you are seeing is an attitude that is very typical of Texas Divers. For some reason, DIR/GUE/UTD is just verboten here, as far as the Diving Culture goes.
I had a buddy of mine, the guy who got me into DIR, matter-of-fact, do a dive on a local lake charter boat, (The Giant Stride, for the locals, on New Years Day, 2011). Anyhow, he dives Halcyon gear, and just the fact that he had Halcyon kit, he said a diver came over to him, and said with a sneer, "Oh, you must be one of THOSE divers." And he wasn't being playful.
Now, this guy is one of THE most laid-back divers and people ever, and he defused the situation, but he said that he was a bit shocked that it would happen. (He was in the military and learned to dive with a DIR group out on Okinawa, and this happened after he PCS'd here to Ft. Hood.)
He got me into the philosophy, I took Fundies, and that was that. I'm all-in, 100%.
As a counter-point, I co-manage (with my wife), a small dive shop about an hour north of their shop, and we are GUE-friendly to say the least. We have four instructors on staff, and three of us are Fundified and Philosophy-Compliant. I am part-way through the Cave course from my GUE Instructor/Sensei/Mentor, and our team is heading to FL for more Cave training this December, and planning on Tech 1 next year.
We try to bring that level of care and attention to detail to our own instruction, whether it's OW, or anything else. We have relationships with two GUE instructors and with GUE-affiliated explorers at the local university, (our primary teaching source, since we teach the diving courses there).
We have had Primer classes here, we offer "tweak dives" for DIR-curious people, and we've attempted to offer Fundies training, but, honestly, no one wants to pony up the dough, or get their gear compliant. (Or if you get someone interested, it's ONE person. Not enough for a class.)
(Snarky comment about Texas Divers and gear configuration redacted. Gotta be a good Ambassador for the Philosophy.)
Anyway, it's frustrating, being into this style of diving, where we are. But you make the best of it. I've met a DIR diver in San Antonio that hasn't been diving in over two years, (since he PCS'd to Lackland AFB), and had all but given up on finding anyone to dive with, then he found us via a SB member here, and that was that. We got him back in the water, and we have another good team member to boot. Awesome.
Again, if anyone in Central TX wants to see what all the hubbub is about, just contact me or maybe run into us at one of the local lakes, (we're out nearly every weekend), and we'll go diving. No pressure, no preaching and no proselytizing. Just getting into the water and diving. We're REALLY laid back and cool, don't care how you dive, and just want to share how we dive, if anyone is curious.
One of our teammates loves to say, "don't talk about it, be about it." Let's get in the water and BE about it. Let the skills, teamwork and protocols speak for themselves. My buddy that got me into it didn't need to say anything on land, but seeing him in the water and seeing the skills in action, well, I realized that I needed me some of that. And here I am...
YMMV.