The challenge with GUE diving as far as I am concerned is the dogma. You must do this, you must do that, you must follow the standards.
You obviously have not taken a single GUE class, or at least a GUE class done properly. There is no dogma. Everything could be justified. You might disagree on a choise of skill/equipment from GUE and have a different opinion, but GUE has already an at least equally reasonable, though different, opinion.
There is no "you must do this", etc... there is only "in GUE we do this" with a very long and thorough "because", if you ask why. I am extremely analytical by nature and my GUE-F instructor and any other GUE instructor I have discuss with had no problem answering ALL my why's.
It's one thing believing that GUE is too rigid, and another thing to consider it dogmatic. The latter is rather offensive, and, most importantly, highly inaccurate. I would dare to say that the 95% of the rec instructors out there are actually far more dogmatic, since I can hardly believe that they can justify to a reasonable degree their configuration.
Diving isn't like that. You're frequently alone and, to be honest, it's great to be able to bimble around a dive site to enjoy the flora, fauna and wreck for what it is without the hassle of looking after someone else.
There is no reason to be alone without a buddy, unless if are living in a very remote place. And for sure you don't have to look after your GUE buddy, because sometimes you even trust them more than yourself. You have in your mind insta-buddies that have no basic skills and require baby-sitting, which is inaccurate for every GUE diver I have seen in the water.
There's some great things that came out of the DIR philosophy; sorted skills and a great starting point for kit configuration. However it's not always the right kit configuration for the dive and circumstances.
It would be interesting to open a new thread and ask your questions. You might not agree with the answers, which is OK, but I would be extremely surprised if they are unreasonable. To my short experience in the interwebs, such arguments do not hold more than 2 replies, but I hope that you indeed you have some valuable insights. Indeed GUE might be a bit more slow to adjust to new technologies than others, which might be annoying for some, but at least for me it's a very big advantage since when a new technology is adopted you know that a lot of thought was put and experimentation beforehand, which enforces the arguments supporting the change.
I could go on with examples, but the DIR community are famously deaf to any form of dissent from the one and only true way to dive. GUE and suchlike can seem more cult-like than pragmatic -- found this in my dalliance with GUE fundies where 'why' questions weren't encouraged as far more experienced divers decided that's the way to do it. It is interesting that many of the GUE people I know are far more flexible in their diving, especially in terms of kit choice.
If you know of a single Fundies class that "why" questions were not encouraged, then it would be awesome if you could report your experience with this instructor at GUE. Practically asking "why's" during the class is expected to pass the class, not discouraged. Creating thinking divers is a priority for GUE and accepting everything without questions is a red flag. This goes to an extend that the instructors will ask you "why GUE does X?", if you seem to uncritically accept it.