Physical documents requires you either to send it somehow with the hope that it doesn't get noticed, or personally deliver it assuming you are not getting track

Physical documents requires you either to send it somehow with the hope that it doesn't get noticed, or personally deliver it assuming you are not getting tracked 24/7, which is a real possibility if you have anything of value for these news organizations. Guarantees provided by E2EE, among other things, do not exist in real life.