This discussion has reminded me of someone I often think of -- a photographer who was staying at KBR when we were in Indonesia, years ago. This gentleman was well known to the resort, and was always assigned his own guide. He was an avid macro photographer, and his dives went one of two ways. He either ran out of film (yes, this was long enough ago that he was using film) or, quite literally, ran out of gas. His guide was prepared to donate, and the dive would end. He was definitely of the "I'll spend 30 minutes on one subject if I have to, to get THAT shot" kind of photographer. I honestly can't imagine anyone wanting to dive with such a person (and no one did) unless it was on a honest-to-goodness project where the documentation was the entire purpose of the dive.
I have dived with a number of professional photographers, in the sense that they can and do sell their work to magazines and for framing, and none of them has behaved that way.
I have dived with a number of professional photographers, in the sense that they can and do sell their work to magazines and for framing, and none of them has behaved that way.