1) Anything that can be effectively described as "blue collar" will probably be replaced by automation within 3-10 years depending on the job. 2) Creative thinkers should be valued more highly in the tech field than those that can just follow orders blindly. Very few tech fields emulate an assembly line and the ability to think for yourself and develop an alternative solution is and should be highly valued. 3) Most people in the tech field, both employees and employers, are probably intellectual to a degree and free thinkers in and of themselves. So the cycle continues.
I'd also like to point out that this idea of a blue collar work ethic is somewhat flawed. There is not specific work ethic associated with the blue collar worker naturally; it's just a result of never having enough money for pleasure, so work becomes a part of the routine. The job doesn't matter as much when you're dirt poor as long as it's making money, and the risk of job loss is what you're describing as loyalty. This is really nothing more than a capitalist machine at its worst, not some utopic worker's attitude we should all aspire to.
A lot of management hates this. Less skilled managers, just want a dev shop where they can build and assemble parts.
I wouldn't work for this guy, I want to work with people who are smarter than me and from whom I can learn new things. That said, he's right to not want someone like me, I get bored pretty quickly when I'm the smartest guy in the room so I try like hell to avoid that situation. But to each their own of course.