In response to your question, “Is this all learned or can some of these traits come naturally as a church leader?”, I believe all Christians have been given one or more permanent spiritual gifts. The pastor with the spiritual gift of administration/leadership may have a different career trajectory than a pastor with the spiritual gift of helps or mercy.
Your analysis of this article was interesting, and I agree that practice makes you more effective in your vocation. In addition, the point about “incremental fluctuations” I have found to be true in my own life. For example, I’ve come to realize that many people have been changed in good or bad ways because of life experiences.