> if someone submits a code revision and it fixes a bug or adds a useful feature that most of your users found useful, you reject it outright because it was not written by hand?

If they didn't read it, then neither will I, otherwise we have this weird arms race where you submit 200 PRs per day to 200 different projects, wasting 1hr of each project, 200 hrs total, while incurring only 8hrs of your time.

If your PR took less time to create and submit than it takes the maintainer to read, then you didn't read your own PR!

Your PR time is writing time + reading time. The maintainer time is reading time only, albeit more carefully.