I'm not saying they are sending the content back, but WhatsApp has to read your message or it couldn't display it, so I don't even know exactly what that partic

I'm not saying they are sending the content back, but WhatsApp has to read your message or it couldn't display it, so I don't even know exactly what that particular claim means? They most likely mean their service or their employees, but this appears to be marketing fluff and not an enforceable statement.