They are doing it for the money and attention. Like a problematic child or domestic pet, it's not all their fault - blame the parents.
Hardly wrote a single line of code myself.
Just crossed 372 sign ups and 73 paying users.
AI has been extremely valuable to me. Objectively speaking I have already gotten thousands of USD in value out of it.
Just my anecdote.
How do you plan to maintain it?
Have you added a big feature after launch that required changes to multiple parts of the codebase?
I doubt that a codebase almost purely built with AI will survive in the long term. If there is no developer that understands what is happening, after a while the AI will start running in circles due to a lack of guidance and new features or patches become almost impossible to push out reliably.