How does embedded require deep understanding of CS? I work on embedded systems (safety critical no less) and while I can point out how they're actually distributed systems or x theorem is applicable all day, my coworkers don't actually need that info to do their jobs.

C and the various C++ subsets called "C with templates" would be much less common than they are if "deep understandings of CS and DS&A" were required in day to day work.