That’s a totally unnecessary high bar you’re setting. Most change is mediocre (a tautology, I realize). I really don’t believe that you can think that fixing a bunch of spelling mistakes is not a small improvement.
About setting a precedent: if you think like that you probably never accept any contributions at all, by humans or otherwise. Contributions by strangers have always been very minor things in general, things that the author cared enough about to make a pull request. In this case I don’t see the difference except for the fact that ai was used. If you just don’t accept ai at all , fine. But just be clear about it. In this case they are calling spelling correction slop. That’s not what slop means. Pretending human contributions were always “great” and nothing else would do is kind of ridiculous and shows a lack of experience in open source.
It's not an unnecessarily high bar.
Change is bad. It takes engineers time to understand and approve. It confuses users. Changes should be made for good reasons, not frivolously.
Just because writing code is easier does not mean you should write more of it. It is more important than ever to carefully consider what you work on and what work you accept.
The user says "this is just spelling corrections" but a maintainer - a volunteer - needs to read all the files and make sure it's harmless and doesn't introduce security vulnerabilities, change meanings, and so on. That's not free.