@aurochs @Linux @Gargron @Kuniti_shino
I jump into here for a solution, a rubbish solution indeed, but a solution nevertheless.
You can use beeper, configure it whatsapp, install beeper on your phone and remove whatsapp, or use whatsapp in a secondary phone that lives turned off in your drawer.
Now this is not a perfect solution, it has some advantages like, now you can't receive whatsapp calls (this is a feature) but the caller will think you are ignoring the call.
You have absolutely broken the E2E, now you trust beeper with your information. You also break E2E not only for you, but everyone that contacts you.
Finally, all the metadata that Meta has and share with whoever might require it, it is still there, I think. Just with beeper in between, but connection, messages sent at what time, etc... is there to be used against you.
You can't decipher privacy images, audios or text in beeper. You used to be able to, but they removed it.
However, you don't have a meta app installed.
I did said it was a shitty solution.