being fairly new here, it is most likely that you should not take my 2c worth very seriously, but I'd venture the answer
which of course would beg the question
"so why aren't they posting anything here?"
It may be something to do with the criticism - photography can be a very technical art form, and people may feel intimidated; after all, nobody wants to get a photograph and be able to say nothing more than "I like it, it's bright" or some such.
I'd love to go into photography, I have an interest in interesting nude pictures, especially of people with scars - but my only cameras have been rubbish digital ones on old second hand phones and I've never really had the time or means to pursue this art form.
-well, that's all I know, or think I know - maybe my suggestion of nude photography will get people more interested in your discussion?