TLDR: Obtusely veiled apologia for moral outrage culture. (you can skip to the last paragraph).
The reasoning for this is the idea that slavery ended because it was deemed "dishonorable" through a transformation of "morals", not through "logical debate".
Further points against "debate culture":
- winning a debate is not about the "truth", but about "persuasion"
- ensuing moral relativism
- debates don't actually change minds
I disagree with the last point. People simply don't change their minds in real time and many people are too invested into their points of view. I've personally gradually changed my viewpoint away from the left in large part due to the general failure of leftists to persevere in debate. What a coincidence then, that some of the same people would question the merit of debate altogether...