For one thing, there's only so much space on your walls for prints, but a huge enormous amount of space in your wallet to hold NFTs. Whales / superfans can spend even more than they otherwise could - which isn't a bad thing for artists.
Another thing is the immediacy of selling. Tweet little corners of something while you make something, tweet about it when it is done, and one or two days later when the auction ends, you have money. A whole of of the friction and delay is gone.
On the other hand, super fast distribution, and direct artist to buyer "connection" on a mass scale means that to make the mega-bucks requires being something like a music star or an instagram / reality star celebrity. Or maybe it's like YouTube / twitch. There are a lot of creators, and some percentage of those creators have massive audiences and some have ten people. Or zero. That kind of change we've seen before in other types of art, and now it's coming here. There are a lot of people who have made NFT's that have never seen a sale. It's not a magic money tree.