People with college degrees earn significantly more over their lifetimes. Also, they usually understand the world and critical thinking much better, have better communication skills, etc. These things are valuable in themselves and valuable for their roles as citizens, parents, community members, etc.
To read that claim from someone with a Ph.D., a degree from MIT, and will soon be on the faculty of "a very good school" is a bit rich. It reminds me of wealthy people who says money doesn't matter to them.
HN is a unique environment of generally highly-educated, high-achieving people. Most of the world cannot program computers; many cannot operate them. It would be interesting to hear from members of the large majority who lack college degrees.