Maybe, but if so, it's a particular kind of persistence: To take an ill-defined and open-ended problem and turn it into a new project, to bring together the knowledge and skills to finish it, and to defend the merit of your work in front of a skeptical audience of experts. Some of what you have to figure out, may be beyond the abilities of your professors to teach you. You may have to invent new techniques on your own.
The problem with this description, is that it resembles people who are entrepreneurs, rather than salarymen. Those of us who are in fact salarymen, often engage in entrepreneurial activity within our jobs. But there is no guarantee that a person with a PhD is going to learn the personal traits necessary to engage as an entrepreneur. Those traits have to come from somewhere else, though they are reinforced by the intense intellectual atmosphere of a graduate program at a good university.