As other posters have stated on this forum, GUE and UTD are not agencies by definition, they are more akin to regional dive clubs (there are others like them as well). We do not agree with the intent of GUE's teaching standards, which are more inline with indoctrination than that of instruction which results in independent thinking divers.
I can see how someone might look at a UTD/GUE diver and deem him/her inflexible (or incapable of independent thinking) but that is the wrong way to look at it. Such divers think quite a bit. It's just that they tend to think alike and more consistent with each other and that uniformity provides strength to the team and adds value to the global network -- that one can join like-trained divers anywhere and have a functional team that is on the same page with one another, more or less. More so than with any two PADI/NAUI divers produced by different instructors even in the same city -- anecdotal observations here

I can see the contrast implication that those who are NAUI/PADI trained are far more flexible and can have differing instruction, equipment, or even knowledge impartation being the ones able to think because they reason for themselves what is best, etc as opposed to "a doctrine" (that is best for the team/group).
I can see those two things, but both are the wrong way to look at it. My definition of "thinking" though, might be different than Moonglow's.