I have a lot to say in response because I've been thinking about this and working on it a lot:
1) No one is selling vibe coded Nostr apps (at least that I've seen), they are free software given away as a gift. You can take it or leave it.
2) I was just at the Munch Museum in Olso, and there were multiple displays of even the earliest sketches of what later became Munch's most famous works (and also many that never did). Same is true in nearly any art museum I've ever been to. Today, these early sketches are worth more than everything I own combined and people would pay good money for a piece of paper Van Gogh sneezed on, while at the time he was seen as just pumping out trash no one wanted. But now his work defines an entire movement.
3) Quick vibe coding apps is practice, brainstorming, prototyping, and idea generation that feeds into those "winner" apps. Refining your tools and practicing using them is a necessary part of ANY trade. The only difference here is it's happening in public whereas historically artists have kept their early drafts private. But this is just a natural side effect of FOSS.
4) Many people are working very hard to take their apps that started with AI and turn them into high quality user experiences, so this is a false dichotomy anyway.