Earlier quoted context omitted.
The author, who speaks of himself in the third person, was a parent and in his forties when he wrote that. Perhaps the article is not a comment on whether making conservative life choices is or isn't cool. Perhaps the article is not a comment on whether a degree in CS does or doesn't provide personal edification or improves your programming. Perhaps the article is nothing more than what it claims to be: A comment on…
Large companies employ many people without degrees, it's really front line managers that handle those requirements. Further, while self taught programmers are often very good they tend to be weaker at working with other developers on large scale projects. So, many managers have examples of both and still prefer people with degrees for most projects.
We can also say that in the twelve years since this blog post was first written, attitudes towards hiring have changed in many ways. Nobody (for some loose definition of "nobody") cares how we would move Mount Fuji, or how many ping pong balls would fit in a 747.
Broadly speaking, though, I stand by the fundamental assertion that the stereotypical "BigCo" values conformity, and values people who value conformity, and that many of the things they lok for are, at a deeper level, social signals.
Startups aren't so different. In 2012, we could just as easily have rewritten this blog post to be about a startup wanting applicants to have a GitHub profile because it indicated a certain need to belong to "hacker culture" that the hypothetical startup could exploit.