Among randomly selected 100 individuals, talents and aspirations would be diverse. It is unrealistic that all of them would like to be artists. Farming brings crops that people want; it can be much more fulfilling than subjectively valued art. Only someone never working on producing material things that satisfy the real needs of others can assume that most people might like to be artists.

Then, even if by some strange circumstances, all 100 individuals aspire to work in one profession only, there would be nothing wrong with it, as long as they could sell products of their work to members of other communities. If we consider that those 100 individuals are an isolated community, with all working as artists, they would have no food and shelter. Soon, some would see an opportunity to advance themselves by providing necessities to others.

In short, bogus assumptions, false conclusions.