As the first step on the path to understanding, first consider: "in what fields do people get doctorates?" As a second step, consider for each of those "what in

As the first step on the path to understanding, first consider: "in what fields do people get doctorates?" As a second step, consider for each of those "what industry will employ them?" If you step over to the non-STEM (and to a lesser extent non-TE) fields, the answer to the second question tends to diminish to "academia".