Vibe coding deps is security through obscurity, with all of its weaknesses (and strengths). It's not that such deps have fewer security bugs than the open source reference implementations from which they are derived, it's just that those bugs are currently less discoverable.
In the near to medium term, the current open source regime has issues because bugs have become extremely discoverable and easy to exploit. But I am skeptical that obscurity will provide vibe coded deps sufficient protection over the long term. As soon as the source code for those vibe-coded deps leaks, you are screwed.