I'm not sure that's true (thousands of famous creative works from the Sistine Chapel to the Benin Bronzes were created on commission/for remuneration), but even if it is, how are creators gonna eat? If the answer is "get a day job", I think that excludes a lot of folks from practically being able to create things. Patreon is not a great way to pay the bills for all but the most famous and popular people on it.