No doubt there are marginal professors who are just barely capable of doing research by virtue of intense effort by the people who taught them, applying the tec

No doubt there are marginal professors who are just barely capable of doing research by virtue of intense effort by the people who taught them, applying the techniques they learned in grad school for their entire careers. Everyone else ends up reinventing themselves and their research multiple times. Even something resembling explicit education in research is unnecessary. The average medical school teacher is a physician who never got a Ph.D. and most teachers at law schools have the same degree they end up teaching (in the US), the JD, which has no mandatory research component.