This is some really old-school statement... If you, as a manager, would hire for a software engineering professional, the last thing you'd want is a servant for your coding problems.

If loyalty is not a big concern (and it isn't really, currently), then I'm there to bring your business up to speed, and you're there to help me advance in this job market.

Engineering is a constant balancing act. If working with this kind of manager favors conformity over business requirements, technical requirements, legal requirements etc. we'd be having a very hard time disagreeing on topics (balancing them out) and working together.