I am not sure that applies generally. I would say it is more that undergrad is generalized, while grad school is usually more focused.

As a chemical engineer, undergraduate was pretty much all general stuff that could be used in real world applications. Graduate students studied one area that could be very practical, could be "5-10 years" from being commercially viable, or something mostly theoretical.

My psychologist wife, however, didn't learn much practical as an undergrad and had to go to grad school in order to get a license in her chosen field - school psychology. So for her, it was kind a combo of both more focused and real world/practical.