This is not a property of NFTs, but rather of new, unproven technologies. If NFTs "make it big", there will be plenty of middlemen that spring up to "help" artists sell NFTs while owning the IP rights and collecting royalties.
And yet plenty of middlemen exist for podcasts, too - Earwolf, Stitcher, yadda yadda. Sure, barriers to entry trend toward zero, but that doesn't mean everyone's going to see what you're selling. Many people will need to partner with someone who can help get their shit in front of people who want it, and those partners are going to want a cut.
Record labels, Instagrams and Etsys will show up to the NFT party in spades.