Well, when a leader focuses more on acting like one and not behaving like one, he's no different than an insecure member of the group. This usually happens when there are more than one competent leaders in a group. So, it's like more of a war situation between the two members, and thus the entire team suffers.
A true leader will always realize the fact that "leadership is situational". In other words, you don't fight people but situations, so to say. Leadership is ought to be situational. A leader is a coach, and there are times when the coach has to take a back seat. Give it a thought! I hope I've answered your query.
Regards,
Sneha