"No privacy whatsoever" is a bit of an stretch of an argument to make, specially when talking to the general public. You have way more privacy when sending a plain text SMS or an email than when sending a physical letter with a wax seal, and most people would argue that the latter is "private" for some definition of the word.

I would even bet that any email leaks that most users would be afraid of are going to be caused by, in this order:

A) The intended email recipient leaking it

B) The email recipient/sender storing a copy of the email at rest (likely unencrypted, even if it was sent encrypted in transit).

C) An official email archiving policy from either the recipient or the sender's organization

And only at at the very bottom of the list "one of the intermediate mail relays being compromised and leaking the email in transit".