The sacrifice of another's is against the Rede. That's part of the point of the Craft. Mostly, the Craft is too diverse and anarchic to follow any one leader. We all partake of Divinity, and no one person has exclusive knowledge of the Divine or sole power to decide the directions of our lives. We have no infallible leader, no Grand High Exalted Poobah, no dogma.
Nobody can have all the answers.
So many of us have our own ideas about what the Craft should be and how it works, that we can rarely agree on points of religion - the idea of all of us agreeing to follow one person is manifestly absurd. Each Circle or Coven may have a High Priestess or High Priest, or it may be democratic and operate by consensus. As it has been said, Witches don't believe in life after death, we believe in life after birth. The emphasis of the Craft is on working to make this life good for as many people as possible, oneself included. We do not believe in a hell, sin, or redemption.