Controversial sure, but if your role is to help students succeed, and pretty much every quality of life indicator shows part of that is raising a family, he's commenting on a cultural change that pretty much everyone has noticed.

It's probably more prominent in the bay area because of the status seeking cultures at Berkeley and Stanford, but it's everywhere. The culture has become more mercenary. The best thing I think young people could do is set the age of their dating profiles 20 years into the future and see what it's going to look like for them. Your relationship options are to work and adapt, or settle. No partner can sustain reinforcing your false narratives about yourself for very long, so find and drop those as fast as you can. As far as success goes, you're not a very good muse for yourself, and nobody else is going to shape you like a family, so have one. Also, stay fit. A lack of fitness is poverty after 30.