Probably because his blog posts are like millions of words of meandering stream of thought and links to public domain books and you would have to spend the next few months of your free time to read most of his posts? Occasionally funny and insightful, but concise and well-written they are not, burying the real content under mountains of fluff.
I do not know the man's writings. There are many links on that page to things he wrote. So this is the most informative link I am likely to be able to provide.
As for why not read his writings: why not read the writing of the timecube guy, or those of reactionary christian authors? Because I try not to waste my time on idiotic polemic.