system
A chat on subreddit /r/PoliticalCompassMemes
human
Really far-right people usually don't get invited so you get right-wingers who are either moderate or walk on egg shells to appease the other side. 

I also think that a lot of leftists who get picked for these panels are twitter addicts the vice staff (in this case) picks because they frequent the same social media bubble.

I have seen a bunch of panels like this, from different outlets, and it often comes off like the "leftists" talk like they are on twitter with an arrogant and entitled attitude that is typical there. 

Obviously not every leftist on these panels is like this but it's a pattern imo
gpt
Plus they can only respond as if they are on Twitter. An actually discussion or organized debate is out of the question.