What can we learn about leadership from Jethro (aka Yitro in Hebrew), a pagan priest? Why are his words included in Scripture?

One tradition says Jethro, Job, and Balaam were all advisors to Pharaoh before the #exodus. Jethro told Pharaoh to treat the Hebrews kindly, Balaam said to treat them harshly, and Job abstained. The story is probably not literally true but is meant to teach about differences in leadership and character.