My problem is not that they're going to fail, or even that they aren't going to learn much from their failure. It's that they're going to take many people down with them.

Just to take today's example: there's a npmjs supply chain attack. Dependabot & co are going to issue alerts. Most vibe coders aren't going to know what it's about, or even care. Which means that some of the users of vibe coded apps are going to lose their life savings over this ignorance.