Replace this example with a different one.
Imagine you just started at a new job.
Your new boss sends you a message:
“Would you like a *insert sexually explicit phrase*”
You reply: “Absolutely not”
But right after you hit send, your boss changes their original message to say:
“Would you like a raise?”
And since the original message is gone, you’ve got nothing to show HR that your boss is a creep.
Now, if they edit the message you can still view and report the creep, and if they unsend, it’s not going to look so good on them.
Someone earlier in this thread asked if people would use these features to do this kind of stuff.
Yes, yes they will, and it’s already a problem on other messaging platforms with “edit” and “unsend” features