Why I'm Not Looking to Hire Computer Science Majors

The problem is that even if you understand those concepts well, you're not necessarily able to apply them after most programs. If your startup is in the business of crating new algorithms to solve various problems, that's one thing, but what most want is someone who knows what existing algorithm should be used to solve a problem in the best (or at least an acceptable) way, and do so in a manner that's both expandable and maintainable. Ideally, they're looking for a craftsman, not a scientist. These roles can occasionally be found in the same person, but it's extremely rare in my experience.