So, the question is, why, in a platform that is pro freedom of speech, some people against edit?

When we edit, the original message is still there and available...

I don't get the issue behind.

Freedom, for me it's letting all possibilities available, and everyone decides if they are going to use it or not. Not allowing is restrictive.

Is like when you make a mistake, you refuse to make things right, because it's simple not to go with the trials of making things right ?

Unless, there is a "code" issue I am not aware, in that case, can I be made aware of it?