The really gifted leaders do it because they have a passion to make a difference, to, as Steve Jobs once said "..make a dent in the universe." Leaders owe that level of caring and commitment to their employees and organizations
We can't always agree on everything and should not. Leaders at all levels need to welcome informed, genuine, even impassioned debate. It's the lifeblood of healthy organizational development, introspection, and ultimately growth and reform.
At the most foundational level, the role of leaders is to solve organizational problems and to prevent new ones. Especially big problems, the kind that might keep the company from thriving, imperil its future, harm the employees, threaten the mission, and/or degrade its growth and potential.
For leaders, 'no' can be a dangerous word. It's a difficult word for leaders to use; we would all like to say 'yes'; to agree, to do most of the things we are asked for. It's human nature to want to be agreeable, likable, conforming, supporting, and part of the team.
The leaders of all organizations have a duty to ensure that their plans, guidance, decisions, and the processes that govern activities actually work in the best possible ways to serve the needs of customers and employees.
The "marketplace of ideas" is a rationale for freedom of expression based on an analogy to the economic concept of a free market. The "marketplace of ideas" belief holds that the truth will emerge from the competition of ideas in free, transparent public discourse.