I'm not sure I'd surmise the dependency of users to be an entire culture in and of itself. Plus, I feel like this splits hairs; going down the rabbit hole of "well who is checking the open source code" and "well who is checking the person checking the open source code" leads to endless complexity, especially when the move in question is more symbolic than substantive. If WhatsApp did not use e2e encryption by default (and they didn't), then there was possibility of governments reading the communications anyway. Does this new announcement really lessen the security and privacy of the users? To me, it sounds like they are making the policy clearer to the public, since US / UK governments have not explicitly made press releases telling citizens which of their communications will be monitored. While I am very much a proponent to end-to-end encryption for ALL communications, I think this move isn't going to sacrifice privacy that users previously had.