Skill is a very big part of being a photographer . That and being able to think fast and change direction . I have heard that number of pictures does play into it too as you say. Everyone thinks they are a photographer just because they have a camera but I don't buy that. I've taken about 1,000 or more pictures in my lifetime and I can think of only one that I thought was good.Isn't all skill. If you take enough shots a few are probably going to be OK. There have been times when I've gone out and taken 200 shots and mayhaps kept 10-20.