On the one hand, I agree with you; on the other hand, citing Tim Ferriss' "Information Diet" idea, once I've established a trustworthy circle of friends, there's a good chance that I'd rather read what they recommend, no matter from who. From time to time, they recommend enough articles from a single writer that I want to "follow" that writer, whatever form that takes. I find myself pruning my RSS feed almost as much as I read it.

Of course, this risks living in an ever-amplifying echo chamber, but if I notice that, then I simply add more diverse friends. :)