I originally posted this question on MSE. People over there tend to feel like editing stuff is trivial enough that it doesn't deserve its own question. However, I do feel that edits on IPS are much more tricky and should be dealt with much more caution than, say, an edit on a technical site.
This is why I'm asking here again (also because I didn't get an answer on MSE).
I tried to find a faq post about that, but couldn't find one.
When should one directly edit a post and when should one just suggest improvement in comments instead?
So far, I have been using my "gut feelings" but, for people on the autism spectrum (like me), clearly stated rules are much less stressful.
I'm asking this because we had an "incident" recently when someone took real offense of an edit while the all issue was only due to miscommunication.
I'm also asking this because I know I'm not the only one wondering when one should just edit and when one should leave a comment instead (or do both).
Some related faq that are linked to the subject:
The faq post about What is the etiquette for modifying posts? is interesting but doesn't talk about when one should be commenting instead of editing.
The faq about How do suggested edits work? don't really talk about when one should edit or not.