And can edit a post twice after hitting submit, almost before someone can quote it, and then tell them they didn't see what they thought.
And the bolded portion is merely a lie.
My practice is to check for typos immediately after posting. No, I don't bother leaving an explanation when my correction was for a mere typo, which generally occurs within seconds after the initial posting.
Any substantive changes I make (very rare) are accompanied by an explanatory note.
Just from your edits in this thread... your definition of typo and subjective change is questionable. Didn't see any explanatory note with the addition of full sentences.
Kent