So you are saying the blog system of 30023 is wrong? Because this one is not any different than that.
Discussion
Blog content I think is different. It would be nice if it had a history that could be audited, but I think people expect blogs to update their contents more than they expect one-off statements to be modified. One-offs are very granular, they don't have multiple component parts that may need adjustment after the fact. Even so, most blog updates usually take the form of "Update: I was wrong in point 37, @person corrected me."
Not for much longer. Now that Twitter and Threads do provide editable tweets, its only a matter of time to get into everything else.
But yes, ideally we show the history of edits.