Ask HN: Why is comment throttling so aggressive?

I wrote five comments (well, it was five at the time) on the NN discussion ( https://news.ycombinator.com/item?id=15754287 )

All comments were relevant, on point and upvoted. Then a submitted a sixth and I get the "you are submitting too fast" slap in the face.

Why is comment throttling so aggressive on Hacker News?

Shouldn't the throttle at least take into consideration the quality of the comments (using upvoted as a proxy) instead of killing the discussion?

And what's with the unreasonable length of the ban? It takes hours before you can start commenting again, which is totally unreasonable.