[Lammy]

> "Whatsapp chats are end to end encrypted so how can my data be shared with FB?"

I would stress to them the difference between the encrypted contents of a chat the metadata ("it's data about data!") of that chat.

Hopefully they will get it if you give an example of how just sending a message lets them profile you based on metadata like the exact time, geographic location, and recipient of the message, all without needing to see the contents. Encrypted messages sent from Truist Park at 2PM on a Sunday? Probably about baseball, etc etc.

Probably too high-level and wordy to share with a non-tech crowd but this is one of my favorite blog posts on this topic, from the immediately-post-Snowden era: https://kieranhealy.org/blog/archives/2013/06/09/using-metad...