I'm not the OP, but I can think of an answer to your final question. Pragmatically speaking, there are only so many hours in the day, and attention is a finite

I'm not the OP, but I can think of an answer to your final question. Pragmatically speaking, there are only so many hours in the day, and attention is a finite resource too, so by automatically filtering things you are likely to find irrelevant, you can save yourself wasted time and attention. Some may argue that this limits your ability to discover new things, cutting you off from a broader discussion, but if you continually come away from certain sites disappointed, why wouldn't you want to stop cluttering your life with their articles?