On NCIS everyone is a superhuman at whatever they do. In addition to the traditional super-cop there's the super-forensics genius and the super-hacker from MIT. I think it's just the kind of show more than the kind of character. And people who watch (and write) hero shows are probably older generations and far less aware of modern job roles beyond the old professions.

But TV always veers off into personal drama, presumably to chase ratings, whether it's doctors or cops or anyone else.