(sorry for editing on the fly - I can explain why I do that but I know it can be annoying when someone is trying to reply! and yes, all that sounds right.)
I'm like you, there is an edit button, so I use it. I have to make a choice and I choose all the people who will arrive in the future over the small number of people who might have read what I've already poorly written, people who can get over it if they want to, even using their edit button if they wish.