No, because you didn't invalidate the cases for which it is used. People should continue using the feature if it meets their needs.
You also didn't address spam and security issues if someone is able to endlessly produce anonymous email addresses and send unprompted emails. This is almost certainly why Apple wouldn't implement this feature as you want.
You also didn't address spam and security issues if someone is able to endlessly produce anonymous email addresses and send unprompted emails. This is almost certainly why Apple wouldn't implement this feature as you want.