Why are the wives of the king called queens and the husbands of a queen called prince?

King is the traditional name for a "ruler", a male ruler. His wife is called Queen. When there is no male successor, as happened in England when George VI died, then a daughter becomes the "ruler". Her husband cannot be called King, because that would make him "ruler". She is not called king because king refers to males. So he is called "Prince". Then "Queen" is the higher rank, and "rules".