What would you think if someone started offering the same image as limited edition prints (at a very high price),
and as a reproduction posters (at a very low price) ? This is done all the time, and there is no confusion between
a photograph and something that is mass-printed with ink, right ?

Now what if the limited edition print was a Lightjet (a photo-sensitive process)
and the posters would be a Epson ultrachrome print ?
This is a process that photographers such as Joseph Holmes or
our own Chris Jordan deem the best color print available, yet others in this forum
call them "posters", or "photocopies". This scenario doesn't have to be limited to color (eg. the work of David Fokos).