We just got back a student F31 SS and I was heavily criticized for (still) not having enough mentorship experience. True that I have only graduated 1 student so far. That student had an NRSA and is now a PD at MIT. They are still asking for a senior co-mentor. Is this valid?

At what point in our careers do we not get this critique?! What are the underlying reasons from senior faculty that make them so worried about this? I& #39;m otherwise well funded and this work stems from discoveries made in my lab! #AcademicChatter