In my main project we added a new requirement that all new contributors meet a maintainer in a non-textual format before their first PR is merged. Seems to work well for a small project.
One reason: automating the construction of a "trustworthy" profile lowers the bar for attackers who want to plant xz-style backdoors. Not to mention polluting the various signals people use to evaluate candidates for jobs.
It's sad that it has come to this and to me it just means OSS is dead.
Yes it sucks, but it's better than not regulating whatsoever, and at least this way I could be more certain my contributions didn't get drowned out.