What is a "fine art" photograph (as opposed to a "vernacular" photograph)?

The distinction is based upon context of presentation more than aesthetics.

While a professional photographer has greater technical ability than an amateur, there's a more level technical playing field than is the case with painting, for example.

A tourist snapshot can be more interesting than a professional photograph of a similar scene, provided the snapshot contains an interesting image.

Admittedly, these thoughts are neither original or profound. Just jotting them down!