Systems leadership is more than systems thinking. It involves the ability to bring together people and systems in a joined-up collaboration.
Systems thinking is an important starting point. But there are many different schools of systems thinking. Each school provides a lens, which allows us to view simple or complex systems in a systematic way. However no school has all the answers.
If you want to tackle complex system problems, you need to be able to view problems using more than one lens. We call this "lenscraft" - the ability to use multiple lenses in an appropriate way.