All these things you mention are corollary to the construction of the building per-se, but are central to the "spirit" of the building. The same applies with this kind of websites and scrolling. The website has a goal in itself, uses a more creative scrolling feature as both a way to better convey the information and a work of art to be more attractive to the eye.

My parallel was that the typical HNer just ignores this and think "don't touch my browser standard scrolling behavior", that would be akin to someone just wanting a plain wall to keep the roof up, ignoring everything else: "I pray there anyway, I don't need that statue to remember it".