In no way does a typical HN comment debate
every possible related tangential point. Do we expect a modicum of intellectual rigor? Yes. But to say every tangent is followed and scrutinized is simply factually untrue.
And several paragraphs? I challenge you to show even a large minority of argumentative responses that veer into "several" paragraphs. You characterize this as "most of the ... responses" but I think that's unfair.
One wonders why you'd resort to such hyperbole unless you were deliberately attempting to undermine the value of the site.