Failing to listen and hear what the team has to say means a leader loses valuable information and opportunity.

Failing to listen and speaking over your crew as a leader, will also cause long term information loss, as the biggest problem that you can have is if people are hesitant to come talk to you about problems.
80/20 is 100% the hardest skill to master in my mind.

The best kind of leader is the one that can make oneself blend in with the whole team. If an outsider couldn't point out who the leader is in that team, then the leader is doing a fantastic job.

I think there are a lot of non-leader type people out in the world who think it's super easy and then they go and create horrible working conditions for a bunch of people.
Because sadly at least in East Europe, it's very common that Leaders are chosen not by qualificiation, but rather by social relations between owners and CEO's.