There’s something particularly paternalistic about this statement from the PM: “Your personal messages, calls and statuses, they will remain end-to-end encrypted”.
The key in that statement is “personal”. WhatsApp already has “ads in the chat list”, aka messages from businesses that have your details. Rolled out in Asia first, and now in Europe. WhatsApp allows you to opt out of each sender. No way to opt out of all business messaging.
Messages from businesses are absolutely not private.