Zilon's post is unclear in meaning and your post is too. You said 2 opposite things in your post so what do you want to prove that it is not Zilon's idea?
Zilon is not talking about edit button
we should use the edit button to make corrections if mistakes are still seen in our post.
Proof read, preview, post and edit, everyone can use it. I agree that if you care about what you post and want to improve its quality as well as don't want to make multiple posts, use Edit button.