Funny thing is that a lot of people actually do give pins and shit. I know more than a few people that straight up gave me their card and the pin number to buy shit when I was a kid.
Besides, giving embarrassing information to a faceless billion dollar company does not feel as bad as giving it to someone who judges you if they find that info embarrassing. It’s illogical but that’s how a lot of people think.
Yeah that’s what sucks about this. But you don’t have to really call for intimate messages. WhatsApp cannot read you message since it’s E2EE but they do store and use the metadata. So a casual message and an intimate messages are the same in a WhatsApp server’s eyes.