While I agree with your perspective, Vieri, I think you may be overstating it. I don't believe "Too many people seem to think that only some kind of photography has meaning." I think photographers have preferences of one genre over another and, perhaps, a small number may poo-poo certain genres out of their own ignorance or, self-importance.
Photography, like art (or as art), is in the eye of the beholder. Opening minds is a most difficult thing to do! I applaud you for trying.