This really assumes that money is more important that creative works (or art, heaven forbid) and that less well-off creators should only exist to serve the mark

This really assumes that money is more important that creative works (or art, heaven forbid) and that less well-off creators should only exist to serve the market. If someone just wants to create something they like, and then own what they created, a big corp or rich jerk could easily bankrupt them through the tax/force them to sell it off. Some things don't need to exist in the context of a market and markets are often less efficient than folks seem to assume.