Earlier quoted context omitted.
Why should I care what those people are reading or think. I'm not them and they're not me and while some of my interests may overlap with them, it doesn't mean I want to, or will enjoy, reading what they read.
Why should you care about the bestseller lists? This is an alternative if you want to get some insight into the thought process of these (terrible) people. Also these three people are examples; the point is that some public people that you may care about recommend books, and that is a way to discover books.
Whoa that is some casually thrown-in hardcore judgement.