In the country of the blind, the one-eyed man is king

In the country of the blind, the one-eyed man is king.

Prov. A person who is not particularly capable can attain a powerful position if the people around him or her are even less capable. Jill: How on earth did Joe get promoted to be head of his department? He's such a blunderer! Jane: In the country of the blind, the one-eyed man is king.
See also: country, king, man, of