I'd like to take a stab at this. Barring certain pitiable neurodivergent conditions, folks consider themselves to be intelligent and highly moral creatures. The primary goal of ideological shit-flinging contests appears to be revealing one's opponent as an amoral imbecile, as a means of both propping up one's own self-image, and virtue signaling to larger audiences. When a true authority joins the chat and nukes everyone's Dunning-Kruger fueled reductionist positions with a comprehensive and highly nuanced grasp of the topic at hand, all of the amateurs at the table are presented with details that undermine their simplistic take on the issue in question. This undermines their own credibility, introduces massive cognitive dissonance, and disrupts their ability to continue to paint their chosen adversaries as dangerous incompetents based solely on the merits of their arguemts. In other words everyone is wrong, and they hate it because ego.