I don't think it's clear that it was an analogy at all. It sounded like a forecast of the collapse of civilization. Even if the claim is narrower, what you're saying is a prediction that can be tested against reality. It doesn't seem likely that a project like Linux, with strong leadership and expert eyes on every change, will fail because of a few AI commits. I suspect reality is a lot less catastrophic and a lot more mundane, and we see a small productivity increase while the project continues more or less as usual.