There are many people who have dual professions. They've invested much time into possibly overlapping work.
I know someone who is both a priest and psychotherapist, for example.
Some have what they consider 'hobbies' which may vary greatly.
There are those who have the ability to be quick studies and can assume positions thought impossible by some.
I'm suggesting you may know some of the above types. Perhaps you yourself might qualify.
There is value in such backgrounds, officially. And an opposite scenario exists.
People 'off the books' are a reality. If so, work gets done, goals accomplished without a trail. Some events remain close to the vest. The seemingly impossible obstacle/challenge is overcome. No proof, plausible deniability.
Such as the above train, yet there is either no trail or a scant one.
And skill is hidden both sub rosa and in daily life.
People appear clueless/unskilled when the contrary is true.
Both sides employ jacks/janes of 'all' trades.
More tools in the toolbox.
Better?
It depends.