I agree but I'd draw a different comparison. That is vibe coding has accelerated the type of developers who relied on stack overflow to solve all their problems. The kind of dev who doesn't try to solve problems themselves. It has just accelerated this type of working, but is less reliable than before.
this matches with my first thought of this "study" (remember what coderabbit sells...); can you compare these types of PRs directly? Is the conclusion that AI produces more bugs, or is that a symptom of something else, like AI PRs are produced by less experienced developers?