You make good points in your post but I cannot agree with your definition of a "hobbyist." The real problem with your definition is when or where, along the spectrum of knowledge and skill does a person become a hobbyist? I began coin collecting as a child when my father would give me silver coins. The Franklin half was the pip because we didn't see many. I had the "capacity" then to enjoy and appreciate the coins I collected even though I had limited knowledge and skill at the time. Since then, I have improved in my expertise and knowledge but that is just about getting better and learning more. I have enjoyed it and appreciated it as a hobbyist all along the way.