Nothing can tear down the cause of Christ more than when a minister is caught in some form of immorality.
The late 1980s saw the downfall of televangelists to sex, money, power and fame. The story of Jim and Tammy Faye Bakker was one of the worst: https://www.christianitytoday.com/ct/2017/september-webonly/cautionary-tale-of-jim-and-tammy-faye-bakker.html. Leaders are to reflect righteous standards in a world that can be hostile toward Christianity. Church leaders are role models. If they cannot live the standards of Scripture, how can other Christians? To illustrate this point, play a game of Simon Says. Have everyone do different motions. Emphasize that leaders are role models— especially church leaders. The Pastor and Leadership of the church will influence the priorities and habits of the congregation they lead.