LLMs can be 'taught' though. You can give them additional context or instructions. The difference is that they can't really teach themselves.

This is roughly what I'm saying - someone who's managing an IC can steer them on the right course, and someone who's managing an agent can also steer it on the right course, so teaching someone how to handle ICs well gives them skills that are also applicable to handling agents well.

It's not perfectly analogous obviously because ICs are people and need to be managed as people, but I really think the skills are quite transferable in one direction. I'll add that I don't think someone learning to manage agents would necessarily become a good people manager.