Some of us read for fun, and his writing is fun! What you describe as "irrelevant" others of us see as "exposition." He follows a fairly well established tradition of using stuff unrelated to programming to illustrate programming (see Joel Spolsky and Philip Greenspun for more irrelevancies).
As well, I think the article could have been compressed significantly; it's overly wordy. Mr. Yegge should apply his programming manifesto to his writing.