I would be shocked if there are not more professional artists now than at any point in history. This "oh, won't someone think of the artists!" hand wringing seems a bit much to me. If a specific art is important, it will stick around. If it's not, it wont. Just like always. You have to sell yourself to rich people or the masses to make a go at it, just like always.
We've had this conversation in the past about endangered languages. The cultural sphere can't and shouldn't be markets all the way down.