You have, to the contrary, continually insulted me rather than addressed the question at hand - and yet you began the conversation!
You began by calling my statement absurd. In order for you to turn your accusation from bare assertion to accomplished fact, all you had to do was cite one specific example of a great work of art or literature made for material profit.
Instead of doing so, you cited works that were done for extremely inadequate pay - not for a profitable return.
I will point out now, parenthetically, that Protagoras was a thinker who is famously attributed with the saying that "man is the measure of all things" and who was associated with the school of thought that holds all opinions to be of equal value.
If you feel so strongly that it is appropriate to automatically label all opinions contrary to yours as absurd and moronic, fine. But let's have some truth in advertising.