I had more confidence in my abilities to be observant, to have situational awareness, and help out where needed. Those things DID make me a better diver, I believe, but were not related to some egocentric goal of holding a perfect stop in perfect trim.
I can't speak for anyone else or for other possibly similar courses, but I did not take Fundies with the goal, either mine personally or of the course, and either "egocentric" or otherwise, of "holding a perfect stop in perfect trim." Rather, equally important goals in Fundies could be described exactly as you did: "to be observant, to have situational awareness, and help out where needed." That sounds a lot like what is taught in Fundies (only it's in relation to your teammates rather than clients).
Oh, and along with the above, they do teach achieving some precision in holding and controlling one's position in the water.
It occurs to me that, at least in the context of the kind of diving I do, holding and controlling one's position in the water could not be
less egocentric, because the whole point of learning to do that is to help the team. In a course, you aim for a high level of precision, knowing that when the shyte hits the fan, you will get whatever precision you can muster, not necessarily as high a level as you practiced in a course, but the better you can handle yourself in the water column while attending to other pressing tasks the higher the probability of a successful outcome for the team.
I once sat in as an observer on what I believe was the first day of a GUE IDC, and one thing the instructor mentioned to his new students really stuck with me, and it was something along the following lines: Whenever you're learning something new, ask yourself, "How can I employ this to help the team?"