I think Part One and Part Two had significant frontpage time on HN, then not so much until now. That raises the question (at least in my mind) what's different about Part Six? I think part of the answer is random fluctuation (you can think of HN's frontpage as a slot machine with 30 slots—it's not random, but randomness is involved), and part of it is maybe that the government involvement aspect makes the information here more significant.
When it comes to divisive topics, HN moderation spends a lot of time in the uncanny valley between the major ideological camps. This topic is a good example. One passionate subset of the community would like all of these submissions to get major attention, while an opposing passionate subset would like all of them to be soundly ignored. Our job is to somehow balance the conflicting vectors. That's not so easy, and also not so easy to articulate. The idea is not to maintain a centrist position*, it's to try to keep the community from wrecking itself via ideological fracture.
* for some reason that is a pet peeve of mine - https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...