Why HN is removing articles that ask about HN policy?

For example this one: https://news.ycombinator.com/item?id=29289875

I would think that if this is such a hot topic that many people are trying to address but does not fit well for HN, then it would only benefit to explain why it is so instead of keeping people in dark.

Besides I find many removed articles are talking about issues with the social media which relates to tech industry in general.