Perhaps, the problem isn't that humans are leaders. Perhaps, the problem is what do humans expect a leader to do?
We expect to be given everything, We expect to have unlimited freedom for ourselves while imposing massive restrictions on those who disagree with us.
We expect to be protected from everything from criminals to the weather and refuse to take any responsibilities for ourselves.
We expect all this for no cost to ourselves, all the while demanding other "pay their fair share".
We also expect our 'leaders' to be photogenic and free from all human failings.
Is there a human who can live up to our expectations?