Leaders can't lead [effectively] if they are not learning. Nothing is ever static and sometimes the simplest changes have a huge impact. I've worked in areas before where people in leadership positions didn't have a genuine belief down in their soul that learning was valuable. That meant there was no budget for learning either and there were always 'fires' to fight because knowledge levels were low. Those were not places I wanted to stay.

Leaders who value learning and are learners themselves have a better chance of growing an A team.