they know nothing?

I don't deal with yeshiva people so much anymore, but in the last few weeks I did on two occasions and on each one heard yeshiva rabbis disdain their students, saying these bochurim don't know anything. that's the phrase they use. "They don't know anything!" They exclaim it. Anything, as in nothing? They know nothing? A 25 year old man knows nothing?

That's what they tell you about yourself so that you'll become a good slave. If you know nothing, you better just listen and absorb what the wise middle-management rabbi has to say to you about yourself.