As an aside, having scroll that thread, Reddit is a shambles. There's more deleted comments and related justification comment than actual comments. Make for a jarring experience.
Their standards of quality are very high. It's not a sub to push your views or argue, it's a sub for historians or people who can back an answer with academic references. So most comments and answers will get modded.
It's oddly refreshing. No flamewars, no junk comments, no "everybody knows the reason X did Y is Z" because that won't be accepted by the mods.
It's not perfect, but it's good enough.