It is very possible fotr creative people to make a living in their art. Very few succeed. For every published writer there are thousands with drawers full of rejection slips. For every artist with salable art there are thousands with attics and garages filled to the rafters with canvases.
There is a market. Just not a huge one.
My Uncle Steve was a sheet metal worker by trade. He was laid off from one job and did a "foreigner" making some gates for a mate. He found it a real pleasure and ended up making a living from it. He had an artistic side that had never had an outlet.
Nobody had ever encouraged him and he was in his 30s before he realised his talents.
Creativity is not just writing a poem or painting a portrait. Its an absolutely massive market.