What characteristic does the author believe prevents effective self-control in leadership?

The characteristic that is believed to prevent effective self-control in leadership is being egotistical. Egotism often leads to a self-centered perspective that prioritizes personal needs and desires over the collective goals of a team or organization. Leaders who exhibit egotistical tendencies may struggle to maintain the necessary self-control required for effective leadership because their focus can be diverted to their own interests rather than the broader responsibilities of their role. This can result in poor decision-making, a lack of accountability, and an unwillingness to accept criticism or learn from mistakes, all of which undermine effective leadership and team dynamics.

In contrast, being overly empathetic, having a flexible mindset, or maintaining a low profile can foster positive leadership traits. These characteristics can enhance a leader's ability to connect with others, adapt to changing circumstances, and remain humble, which can promote a more collaborative and effective team environment.