Earlier quoted context omitted.
According to Meta Whatsapp is E2EE and Data requests by government agencies can only reveal metadata like recipients, durations of calls, frequency of messages, but not content of messages.
"Hey Timmy I noticed you talk to Susan 5 times a day sometimes for 5 minutes and sometimes for 2 hours. Always right after you say goodnight to us. Sometimes I see you call her late at night from outside her house for 10 seconds when you were supposed to be in your room and then you don't use your phone again for a couple hours -- No no, im not invading your privacy, it's only metadata"
The basis of using a service is that you entrust them with the care of your necessity. That they make it unable by policy not to look at the contents of your mail is a nice feature, but nor necessary, as we firstly rely on the good faith we put on the service provdider. To go ahead and request that the security measures be extended to data necessary to route communications, is of a pathological paranoic nature.
The mailman needs to know the address.
Mailmen who don't require your address to deliver may appear as competitors, but they will always be a shady second choice, because mailmen need to know your address.