That's essentially saying the orchestra should cater to the audience's prejudices, and could be used to justify any prejudice.
Certainly a segment of the entertainment industry earns money by catering to the worst aspects of human nature, but that's not the whole industry.
Also: Give me the best orchestra. I don’t go to the concert to gaze at a bunch of beuatiful penguins and ladies in dresses. I go there to listen to music. If they are good I don’t give a damn about their looks.
An orchestra must give the audience what the audience expects. Is just an expensive entertainment act.
It not just entertainment for a lot of people, unless you consider all cultural events "expensive entertainment acts".