Educators Engaged in Adult Education

I was surprised at how quickly and joyfully the people we asked to write on this topic did so. Language teaching is not really a field like computer programming or medicine that needs constant retraining, and yet a large number of us seek professional development whenever we can. We go to workshops, participate in conferences, and even disrupt our lives to go back to school. I wonder why? Is it simply a bias towards learning because we are in the learning business?