I think he's implying that you get it through an abundant portfolio and the ability to ace the "practical" kind of technical interview, but you're right, that needs to be spelled out. I imagine that very few people doing everything this guy is describing are going to get a job at one of the larger companies with a more rigorous vetting process where the gaps in the CS fundamentals are going to show. He should delineate the kinds of jobs these people will be strong for.