(In principle, you could use "write something that someone else would actually read", but I think this is much harder, because it's much harder to know how other people would react! If you yourself would read it, well, we aren't that unique, lots of other people would read it too.)
Also, props for this stark picture of reality: https://refactoringenglish.com/chapters/write-blog-posts-dev...
This is a good rule, and I think the first test of it is "have you suffered through proof-reading it three times?"
The garbage people write when they don't even proof-read it themselves! I find that by the third time I read through my writing (ideally spaced out over a few days) I have worked out most of its kinks.
And read it out loud! If you cannot, at least get an AI voice actor to read it for you. You catch so many more problems that way.