I think there is something about textual communication that is more meritocratic. It better holds people accountable. If you say something dumb, someone else can easily call it out in a thread, and if you don’t respond to that thread, well, it kinda just sits there and makes you look bad. Sort of. On the other hand, in oral communication, you can say something dumb, the conversation moves on, and people don’t get a proper chance to call you out for the dumb thing.
Related: Four Layers of Intellectual Conversation.