> but if AI is just as good, doesn't that just mean more good PRs?

If you believe the outputs of LLMs are derivative products of the materials the LLMs were trained on (which is a position I lean towards myself, but I also understand the viewpoint of those who disagree), then no, that's not a good thing, because it would be a license violation to accept those derived products without following the original material's license terms, such as attribution and copyleft terms. You are now party to violating the original materials' copyright by accepting AI generated code. That's ethically dubious, even if those original authors may have a hard time bringing a court case against you.