I think the issue most of us have, is that vibe-coding is not being treated as a dog fooding experiment, but as a legitimate way to deliver production code.
I am already seeing "vibe coding experts" and other attempts to legitimize the practice as a professional approach to software development.
The issue is clear, if you have accepted all PRs with no reviews as vibe-coding suggests, you will end up with security and functionality flaws.
Even if you do review, if you are the type of developer who thinks you can vibe-code a serious project, I doubt you are interested in regular security reviews.
Lastly, businesses are long lasting projects, and the state of AI is constantly evolving. Your codebases stability and speed of development is your businesses success, and if only the AI model who built it understands your code, you are on shaky ground when the models evolve. They are not constantly forward evolutions, there will be interactions that fail to fix or implement code in the codebase it previously wrote. Human engineers may not even be able or willing to save you, after 3 years of vibe coding your product.