I get what you are saying, but the way I see it, the amount of technique one needs to learn in order to get started with expressing concepts with the camera is minimal; much, much, much more minimal than almost any other artistic medium, IMO. The basic techniques take about a day to explain to a group of students (composing, how shutter speeds and apertures affect the picture, exposure, how light meters work and how to use them, focusing, depth of field). Then it is just a little practice, and you can start expressing concepts visually. The great (and terrible) thing about photography is that you can do a whole lot with it if you have just a little bit of very basic information.
So, I think there is an initial technical hurdle that takes just a little bit of understanding and practice, but after that, most of the visual vocabulary is complete, and there are just bits and pieces to learn as you go on practicing.
I believe "artistry" is mainly something that is a characteristic of a person, and has little to do with medium or technique. These things simply hone and focus ones artistry. I don't think that you can become an artist just because you start using a medium that is used for making art.