(It’s not clear what the conclusion was here so I hope it’s ok to resurrect it!)
I really wish I got an email for my own posts! My use case is that I when I vaguely remember an old discussion, I have no idea if it happened via old-fashioned email or via Discourse. If everything from Discourse got copied to email then I could grep my email for something and find it wherever it lives. (Also it’s a nice additional layer of emergency backup to have copies of everything in email. And I personally don’t find it onerous to hit archive on emailed copies of forum posts I’ve already seen.)
Persuasive? I’ve looked through the email settings and don’t see an option to echo my own messages to email.