I think he meant things like his personal notes and files stored in an app like Evernote, which law enforcement can request copies of. I don't like the idea of someone reading my private notes...

Me either.

You can write them down on paper.

If we all acknowledge that the internet is a beautiful disaster that shan’t be trusted, which it always has been and always will be, we can all collectively get over ourselves about privacy on the internet. “Hey world I went overseas for vacation/holiday! I cooked this amazing dinner! I’m cheating on my SO using an online chat app!”

Maybe stop doing all 3 of those things. I can’t tell you how liberating it’s been since I got off all social media in ~2008. It’s super easy to be very private if you so choose. Having any kind of internet presence is a voluntary sacrifice of privacy.