By "tl;dr" I refer to the attitude that rejects reading something solely based on its length. That is not a good survival skill, any more than rejecting all but candy is a good survival skill in an age of calorie surplus.
There's a difference in that analogy, though. You don't want to overconsume calories; you do want to consume as much information as possible. If we were trying to maximize calorie intake over time, corn syrup would probably be the winning route.
That's an interesting observation. I don't agree with it though. You suggest that one should consume information up to one's limits. When then does one create information? Even if that information already exists - quoting Westheimer, 'A couple of months in the laboratory can frequently save a couple of hours in the library.' - the process of creating the knowledge is good practice for when one needs to create new knowledge, and for evaluating the validity of existing knowledge.
I do think your second sentence is apropos, but in a different way than you intended. Corn syrup, while calorie rich, provides neither protein nor necessary vitamins and minerals. For that matter, reading summaries is often information poor, compared to the underlying material.
