Maybe it would be topical to use a "herd immunity" argument. We all need to have privacy to protect those who are vulnerable as it's impossible to only protect the "at risk" people.
Each time someone presented the "nothing to hide" argument, I've responded -- "great, may I have your phone, I'd love to browse through some of your emails and photos"
That's a nice analogy! And just as with diseases, it sometimes happens that people are a lot more vulnerable than they thought.
Exactly. I don't have anything to hide, but there are some things I need to protect.