Why? Audio and video are so low bandwidth in terms of information, especially for a debate. With text and forums, I can go through links, numerous counter arguments, skip past trolls within seconds.

What information are you talking about? For a simple list of facts? Sure. But there is so much more you are getting. An hour spent on a discord call with friends transfers a whole lot more information than an hour spent typing messages to each other.

Personal interactions with an acquaintance in real time might be beneficial for some things, but as a spectator, written back and forth is much more efficient.

Prime example is how HN comments contain a wealth of information compared to the articles they link to. I gain absolutely nothing from hearing or watching someone speak, except for wasting my time. I’d rather read their transcript and the ensuing discussion for a quicker, more balanced view of the situation (assuming the people in the discussion are qualified to discuss).