Holy Orders is a sacrament which confers priesthood. Priesthood is about spirituality and treating people as Jesus did in the Gospels. Being a Cleric is about having a special position in the church. The sacraments we provide are valid sacraments. The two are usually equated, but they are not the same.
Good physicians are still good physicians - whether they are single or married.
For the first fourteen centuries of our Church's history, priests, bishops, and 39 popes were married. Married priests and celibate priests worked side by side in service to the people of God. The majority of the celibate priests were monks. A string of worldly medieval popes worked to impose mandatory celibacy on the priesthood in order to centralize political power in Rome and seize the land of the married priest families throughout Europe. They succeeded at the Second Lateran Council in 1139.