That's quite a niche view.

In fact art is an overlap of many different kinds of markets selling to many different kinds of customers - from people buying phone wallpapers online, to tourists buying souvenirs on holiday, to oligarchs laundering money through prestige purchases.

And many others.

A community gallery is going to intersect with a couple of those, but not all of them. Sustainable funding is a goal, but maximising income isn't.

Financial success doesn't sane wash narcissistic entitlement, of which there is plenty outside of the arts.