Is there a TL;DR version? Before you downvote, I don't want to invest hours into reading something when 80% of the value can probably be summarized into one paragraph. BTW, I wonder how many of the people who upvoted this have actually read it.
I have never read quite such a lazy comment on HN. Do your own research, instead of grifting off other people's opinions.
I actually spend a lot of time reading. But if I have, say 4 hours per day allocated to reading, I want to choose material that gives me the highest possible value per minute of reading.
You're basically saying that the optimal learning and information consumption strategy is to always either read (or skim) the whole thing or ignore it. I disagree, the optimal strategy includes reading TL;DRs if available because they give you good value per unit of time or energy and they give you information whether it's worth to read the whole thing.