.... a fair retort. May I respond:
1) Indeed you can't just do "what you want" - but when what you do is lauded and desireable, is it really that much to ask to be able to make a living from it? From a zen buddhist perspective, we could also simply do what we do and let people benefit from that without thought of reward, be that making art, tables, or farming the land. It works when everyone is as altruistic and zen-buddhisty - but it doesn't pay bills that are at a baser, more real level than idealism and philosophy.
2) I'll wager you never actually talked to an artist beyond firends who "like to draw." I'll also wager that you've never earnestly talked to someone who had an goal that was not aligned with your ideals for goals. Saying what they want to do is merely a "hobby" is rather belittling - we may as well state that anything we do before it becomes an idea of a career - planting tomatoes in the garden, knitting... installing an experimental Linux - is a hobby and should just be left as such. When a hobby becomes a career goal, you can't just brush it aside in your head. No, TV is not a hobby, and my hair is black, the point is moot. TV is however an industry that employes lots of technicians, accountants, writers, actors, cleaners, builders, journalists, etc. And in small doses is no bad thing either. If you can temper yourself, good on you.
3) Many activites came from humble roots, farming, sewing, washing, hunting, all of which were community activities that weren't "careers" or "employ" and were performed to maintain a community with no exchange of funds but the share in the fruits of labour. But hey, things changed, we operate differently. On the point of art, even if we disregard the "masters", there were also small time painters and sculptors milennia before the Internet. They still wanted to make it a living. They provide stuff we like, why shouldn't we give them something in return?
I guess in all of that, it can still be argued that things change, and the age of the paid artist may be drawing to an end. But isn't the point of our modern society to find better ways of being, to allow everyone the ability to work towards a dream - especially if its product is something we admire? (not that that is a requirement - we have scientsist spending vast amounts of cash on research that won't amount to anything useful but the sheer act of learning).