Think about it : The manager has to take responsibility over the entire team efforts and output, to be answerable to the partner. It’s damn scary. You often don’t get to choose your team members and have to work with people you met for the first time.

Imagine a project work where you do your best but your whole team cannot make it and you end up getting like a C grade.

I really hate this kind of situation of being held accountable for events or people outside my control.