Same. I just said I was no longer using WhatsApp. Sure, it puts the pressure on them to switch, and makes you the bad guy for a while, but it works.

I mean, they are not going to stop using it for other people, but at least your communication will be somewhat private. At least until WhatsApp finds a way to siphon data from other apps that is.

Can’t they just say the same right back to you?

I agree with your position. It’s just worth noting that you do indeed have to be willing to walk, potentially permanently.