I didn't say what should appear on HN (that would make the the set narrow), I just expressed something that shouldn't be here (that leave it wide wide open to many things)
You still narrowed the set of things that should be on HN. By expressing the set of things that should not appear on HN, you actually do dictate what should appear on HN. i.e. anything can appear on HN except xyz.
May be my definition of HN being "news platform for news which justify the philosophy of word hacker" being wrong and I should just refer HN as "just another any news dumping area which has the word Hacker just as a word"
Well, it might be a good moment to review the submission guidelines:
On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.