Pithy?
Therein lies the subtle difference between 'news' photography, 'photojournalism' and 'long form documentary' photography. There is also the genre of 'art documentary' photography which is probably best left in it's own narrow enclave. Despite the fact the primary driver is to 'get the shot' of whatever happens to be newsworthy great pictures are still made within the news sphere. That's the nature of the medium. e.g. - monkey selfie!
I like what Tom Wood said in
What Do Artists Do All Day?: "When the stuff is too journalistic and documentary then it is journalism, if it is too conceptual and arty then that is another thing, but where the two meet - that is interesting."
I keep starting a blog post/essay on the subject but struggle to make it clear what's in my head.
I think a lot of the snobbery from the art side of photography is down to an inability to understand that photography really is a medium in which enough apes with cameras for long enough could make a picture as good as an Ansel Adams or and Edward Weston. Or perhaps a Martin Parr or Nan Goldin. It's the same with people who can't accept that a happy accident can be a great photograph. (As I read on TP the other day). Or that taking a long burst of frames to pick out the best one is 'cheating'. These are inherent properties of photography. The way casual snapshots were framed influenced Degas and Manet. Artists embrace chance. I risk waffling at this point so I'll stop.
I took up photography to make pictures. As in arranging shapes and tones of the real world within the frame. The limitations of being stuck with things as they are is what keeps me interested about making pictures with a camera. For me that came first. The drive to record events, places and people came much later. But I am always trying to make pictures that have something about their formal structure which looks inevitable. If that makes sense.