You are right, many don't run their own node. But many do care about decentralization. In the end, for artists playing with NFTs as the medium, ETH is the most decentralized solution with the least friction to do what they want to do. But to many, it's just about quick $$.
Discussion
If you care about decentralization you'd run a node, there is no way around this. And it seems like the shitcoin community in general just happily rely on third parties to interact with their favorite blockchain which is insane
Fair, and you're right in some sense. But then that simply makes this entire thing exclusive to people that can. Grandma will never run a node.
I agree that, with the solutions we have today, not everyone will run a node but your grandma would most likely trust your node and IMO it's better to trust a close relative or friend group with their node than a corporation's node