In this particular case, the article reads to me like someone sharing their emotions and feelings, achieved by contempaling some minutiae of experience in Japan. Does that explicate an experience that generalizes? Apparently not, but this certainly seems like a different matter.
Put a bit extremely, the article is also a pretty terrible recipe for turducken. I doubt many would flay the article for this failing, but the point is that judging an article or opinion's failings says just as much about the reader's personal expectations as it does anything else.
Pretend for a moment that the article was written in the form of a poem. I seriously doubt it'd be getting the same kickback for "lack of objectivity." I would guess this is because we culturally learn to approach written language with different expectations, based on the form of its presentation. Heck, I'd not be surprised to even see some interesting anthropological theses on this very phenomenon.
Anyway, winding back the meta-levels a bit, I do get where the author is coming from, myself having lived in Japan for ten years. It's possible to find poetry or meaning in certain minutiae of daily experience, and when thinking in Japanese I certainly do interpret, feel, and use silence differently than when my brain goes into English mode.
Think for a moment about the "magic" of watching a Good ol' American Superbolw game with your friends and family, or how about drinking at Ye Olde pub down the road with yer mates. The experience is singular in a way to the particular culture it's in, and after accumulating many memories of this experience, it's common for those memories to achieve some "special" emotional quality that's diffilut to transfer to others who haven't done the same. I read the original article as an attempt to share some similar kind of feeling.