Sure, it takes a rare type who can successfully earn a living as a computer whiz, and then halfway through their career go back to school to become a medical doctor and succeed at that as well. Though a few have done it, I think one of the designers of the Altair 8800 computer, Ed Roberts, did exactly that.
What I'm more trying to get at is that I've worked with a fair number of people who are whip-smart on paper, but don't really know how to organize their lives effectively, or navigate the complexities of the social interactions required in the "real world."
Narcissism comes in many types, the Donald Trump-style arrogant bloviator is certainly one variety, but there's a more insidious (and perhaps more common) variety that often strikes "high IQ" introverted types...a sort of mentality that "The world doesn't understand me", "The world does not deserve me", and so on. Arrogant superiority and aloofness is also an unhealthy personality style, even if one spends most of one's time not engaging in social interactions.
No matter how good these types look on paper, they usually suck to have as employees because they don't know how to operate in a team environment. They're often convinced that other people are jealous of their "genius" and avoid them because they're intolerant and judgmental, when the real reason is simply that the complainant's haughty, dismissive personality is off-putting, and they have the social graces of a tungsten carbide slug. I.e. they're creepy and nobody like 'em.
From most second-hand reports, while Steve Jobs was likely a genius in his way, in the business environment he was an antisocial, arrogant, abusive prick who sucked the morale out of everyone around him. The only reason people put up with him is that he was so innovative that it managed to compensate for his huge flaws. Most self-described "smart people" aren't on that level, and don't have what it takes to get away with it.
Anyone who chronically complains about how dumb people are in general IMO simply doesn't have enough real world experience with people, as at least for me it's not my overall impression of humanity.
I see that stereotype thrown around a lot, but in my experience most of the "kids these days" who manage to graduate with an engineering degree from a big name school are driven, independent learners who are pretty bright. Whether they're excellent wire-solderers or not is kind of irrelevant as that's not the point of a STEM degree - critical thinking and problem solving ability is.
The 324.76 ohm resistor thing just sounds like a lack of experience on real world projects.