You can vibe code safely for sure.

I am not saying vibe coding is the issue. The issue is that a typical developer might be working on a lot more projects that run concurrently then they used to. And because of the various nature of the project the risk is significantly increased.

Scale this across the workforce and you not just doubled the problem.

You can also fork everything and maintain local versions that you much more easily resolve conflicts with upstream with AI and get the best of both worlds while you work through the backlog of internally reimplementing all dependencies, which even with AI will take a long time.