There's jobs you can fake your way through in a week and there's jobs that take six years to not kill people.
The cliche example is fast food because you really can do it badly on day one. Literacy is optional. English is negotiable. That's unavoidably distinct from jobs that require higher math or high voltage. The fact a surgeon would do worse at flipping burgers than anyone who's worked retail does not change how people skills and sticktoitiveness are no substitute for recognizing a tumor by sight.
We will always need a way to describe that gap. You're welcome to suggest alternatives.