You aren't missing anything. You can't delete them yourself, but, you can pause them. For now, for me, the pause works just as well because if/when any of my email addys starts getting ridiculous spam I'll just pause it. I run a business off one of my accounts and I don't want any of the emails I've handed out to not reach me so I am fine nit being able to delete (for now). I've just been extra careful to choose addresses that I don't feel a need to delete.