But they did say "many of them are idiots", which is similar and rather arrogant. I don't trust people who claim their colleagues and classmates are idiots. Dunning-Kruger effect and hubris being what they are.
If the performance of those PhDs were extremely subpar to the point of hindering the research altogether, what sentence would you use to describe this situation?
I have no interest in arguing about the interpretation of that sentence.
Then don't "interpret" anything. The person who wrote that sentence explicitly said "many" and not "most". Barring some evidence to the contrary, the sensible thing to do is take it literally, no interpretation necessary.
I changed the text from "most" to "many" to more closely match. This seems like a fairly pedantic thing to complain about, not really contributing to the substance of my argument.