I agree with your main point here, but I think you're trying to paint and overly broad claim about PhD programs, which are extremely different between instituti

I agree with your main point here, but I think you're trying to paint and overly broad claim about PhD programs, which are extremely different between institutions. It's like saying "working at a company is like this... you learn this but not that." Specifically, 1. Senior PhD students in many research groups can become de facto managers of the group, especially when the professor is on sabbatical. PhD students are often involved in the funding, presentations, recruitment, and represent the group. Some PIs/professors empower their PhD students to run a mini research group within their group. 2. I've seen some PhD programs have a strong emphasis on teaching undergraduates, both as in teaching undergraduate courses directly (which many PhD students in the humanities and social science already do), serving as teaching assistants with a substantive educational role (not just grading), and mentoring them in research or more general advising. For example, Brown University and Princeton are known to have a good research-teaching balance for PhD students. Brown has a large number of programs that help PhD students get more involved in undergraduate teaching [https://www.brown.edu/sheridan/programs-services/certificates https://www.brown.edu/sheridan/programs-services/certificate...]