Before I took fundies, I was told "you don't have to drink the Kool Aid, just go for the skills." And that's what I did. I still dive air, solo, a Prism2 rebreather.This is an interesting take on the situation, however, with most GUE instructors, you can't get the training without getting the equipment and procedure dogma. I don't associate good diving skills with DIR/GUE exclusively, I believe good skills can be attained without drinking the Kool-Aid. I believe there is more to DIR/GUE than just equipment and skills. I believe it is a rigid acceptance to a set of standards, some of those standards are just not necessary for recreational diving. I am not saying that they are not useful, but not necessary. I would question whether some of the skills makes diving any more safe or pleasurable, both are very subjective. I know many divers who are very safe and enjoy their dives without perfecting all the skills taught by GUE.
I do find tremendous value in fundies for improving recreational diving skills. It is a recreational skills course after all.
Now will any GUE instructor dive with me? Maybe not. Not a concerns of mine. Will some GUE divers dive with me? Yes. So what's the problem? Sure there are those who have drunk the Kool Aid and are obnoxious, but fortunately, that's not the case in my region.
The reason I advocate fundies so much is the pervasive mediocrity in the industry. And I pass on the same advice that I received. Go back to your split fins and jacket style BCD when you are done, suicide clips, whatever you like when you dive. Just go for the skills improvement. If anyone wants to take fundies in my area and don't have/want blade fins or a BP/W, or longhose, I'm happy to loan out mine for free.
People need to understand that the dogma/equipment/procedures is all about what happens when things go seriously wrong and you are very deep in a cave. Which doesn't apply to 99.9999999% of divers (I think that percentage is likely too low). If people were to just simply take that into account, there'd be a lot less bickering.
In the meantime, I steer people towards RAID instructors as they at least have objective performance requirements that include trim and depth change during skills.