You are assuming that the majority of artists do so full-time. Thats a false assumption. The majority of artists do so as a hobby, not as a job. Get a clue.

Jeezus H! That's one hell of a sweeping generalization. And with those artists that don't practise their art full time (but would probably be rather insulted to have it called a 'hobby') - have you considered the possibility that this is so because they have trouble making a living doing it?
BTW, right here and now I'm not arguing for or against copyright, I'm just saying that, with regards to that statement and considering the broader picture, perhaps you're suffering from a dearth of clueness yourself...