It is a little confusing to a user coming from classic where the one email address was available by everyone.
In hindsight, Rick probably should have enhanced the profile a bit to let a user know the email was private.
And add something as a option to allow the address to be public or not, and say something to the fact that they can use a alternate email for public use.
BTW, Rick did add it to the FAQ link for the boards.
But who reads the FAQs but as a last resort.