There is a limit to the application of democratic methods. You can inquire of all the passengers as to what type of car they like to ride in but it is impossible to question them as to whether to apply the brakes when the train is at full speed and accident threatens.
It is a myth that art has to be sold. It is not like stocking a grocery store where people fill a pushcart. Art is a product that has no apparent need. The salesperson builds the need in the mind of the buyer.