It isn’t about evil corporate/fuedal/whatever interests ruining art. It is about having the time to make art. Ethan Chlebowski and Brian Lagerstrom semi-recently did a podcast where they talked about this. For a 20 minute recipe video you tend to have to iterate on the dish at least a dozen times (if not more). And that costs money and time.
You can more or less math how many tickets you’ll sell at a theatre or what your ad/sponsor revenue will be for a video to budget that out. You can’t really do that when you are counting on sporadic donations.