It's easy to paint photography with a broad brush. Some people carefully compose shots in manual mode, and others have already mentioned the added hassle of strobes adding complexity and bulk.
I'm one of those people who takes snap shots in part to log the dive from a visual perspective. I won't long remember what I saw on the dive, and if I don't get pictures, pretty soon it's like the dive didn't happen, and that's frustrating. Reviewing my shots later, and showing them to friends, is part of the joy and experience of diving for me.
That said, these days I put my point-&-shoot (no external strobe, in underwater mode so no manual fiddling) on a snappy coil and clip it to my upper right D-ring. I used to wear it on my right wrist via lanyard, but there's the distraction that it could come off, and it somewhat ties up the hand when exiting. The snappy coil I'm using is long enough I don't even have to 'open it up' and take advantage of the coil; I can use it when I need it, let it go and ignore it when I don't, and let it dangle when I'm exiting. Not much added hassle.
But yes, trying to carefully compose shots can blow buoyancy and cause reef damage. Be aware.
Richard.