Comment by Analemma_
I think if I were a random Google employee submitting Kubernetes patches at my day job-- i.e. not a project maintainer, but just someone in the K8s org chart-- I'd be kind of annoyed if I got cold-emailed asking me to help merge their patches. I'd probably trash that email and assume it was some kind of scam.
I get that the current system isn't working, but I don't think you should just go emailing random committers, that seems likely to just piss people off to no benefit.
Github suggests reviewers to PR authors based on who's been modifying nearby code recently (ok, I don't know whether that's a general policy, but it happens to me all of the time). And for the past year or so I have been getting tagged to review more and more AI slop from newcomers to the project that we chose to maintain in public. I just immediately nope out of all reviews now if I don't recognize the submitter, because I don't scale enough to be the only actual human involved with understanding the code coming at me. This sucks for the newcomers who actually wrote the patch themselves, but I can't always tell. Put some misspellings in your comments and I'm actually more likely to review it!