Personally I've been researching and creating philosophical theory about individualistic anarchy, solipsism, egoism, etc., for a while, and I like to read condensed information about things, because, as you say, I will otherweise have to spend a long time trying to separate all wheat from chaff, and it can get tedious when your effort is elsewhere.

And I don't consider myself "one that doesn't know". I know a lot. I just don't feel like spending hours reading something just to find out I have no use for it. :) That is why summaries, abstracts, syntheses, etc., are useful! There are millions of books out there!