Don,
Okay, you got me! That said, I just don't see a pat answer, although, I see you already received a "Pat"(M) answer.
To both of you, I would say that I have always been taught, and believe, that the "Master Builder" syndrome as championed by RTJ, FLW, etc, is largely marketing, and not usually true in the real world. Maybe too many cooks spoil the broth, but I have always believed two heads are better than one.
More specifically, while I am a landscape architect, I focus on golf and in your example of being in charge of everything from the front gate in, I am not sure I should be in full control. Yes, I am an LA, but there are others who have specialized in that kind of landscape design who have far more experience than I in designing the front entry sequence. Why should I control that? There, I would like input, but let someone more experienced than I control the final.
As to your other examples, of the gca taking the lead to parcel out the budget, rather than have the irrigation designer try to sell the most expensive system, the bunker liner guy trying to sell the most bunker liner, etc., they yes, I agree that is the architects job as the first among equals. There, I would like input from others, but feel like I should control the final.
And, it sounds like you and I approach that aspect similarly, as I suspect most do, at least in the middle rung.
As to Owner/Superintendent input, I usually work with the superintendent to get a maintenance program he can feel good about given his experience, proposed budget, etc. In truth, I have always found that if I design a hard to maintain feature, it usually gets eliminated in a few years. The nice ones ask me back to consult, others do it on their own. My experience has led me to consider that as one of my design principles, and I am not sure there are too many examples of me just "having to have" some hard to maintain feature. (The closest being choosing 'cape and bay" bunkering with wash prone slopes for aesthetics over flash bunkers. Even then, I have modified my style to flatter bunkers that supers want, sloped just enough to be visible and have variety and aesthetics. And that includes flatter bunkers to eliminate liners......it seems like you have to give to get)
There are many final products that can skin a cat, and getting stuck on just one with some obvious flaws still doesn't seem like good design to me.
Cheers.