rbanffy gave two of the reasons (historical importance and obedience or lack thereof by technical employees).

My other reason is that the article reminded me of earlier discussions on Hacker News about actual and perceived government censorship (especially wrt Twitter), mass propaganda (fear of which was a motivator of the TikTok ban), and (actual and alleged) large-scale crimes (riots, drug trade from the US southern border, and illegal immigration).

I also had a not-really-a-reason, an impression and assumption that Hacker News tends to be sensitive to revisionism of history and truth in real contexts (communist China) and fictional ones (Nineteen Eighty-Four)