That's interesting. You think all firms that audited WhatsApp and Signal protocol used by WhatsApp and all programmers who worked there for decades and can see a lie and leak if it was true are all crooks? valid opinion I guess, but I won't call it "no one should believe for a second
(curious you didn't mention Telegram, it is actually marketed as secure and e2e and it has completely gimped "secret chats" that are off by default and used by like almost nobody.)