Inner peace (mental strength). You need to manage stress, bad code and broken business process. In most cases coding is mentally exhausting.
Ability to listen people. This cannot be overstated, It helps to align effort and value. You want to do things with the highest value with the least effort.
Introspection. You need to investigate your experiences and decisions to learn. It is about learning from own and others mistakes.
I would argue that from some point in your career coding is easy part. Other aspect get more important.