I agree.
Recently, a moderator on a Discourse site edited one of my replies to a topic where I listed out some things about a project from my understanding. That edit actually provided updated information and more accuracy, but it was some time after my original reply. So people may have seen my outdated understanding of the situation, and would never know about the edit to have more accurate information.
Granted, in this case there were follow up replies to bump the topic up the list, but I’m not sure how anyone would know that an earlier post was edited without happening to scan for the red pencil.