It left open for the time being medical applications which might one day arise out of the Roslin technique, but which fell short of cloning a full human being. Diversity and Control Cloning is not unnatural. Bury a potato and you get a clone. But the fact that it is not normal in humans and mammals points to a deeper significance. Genetic diversity matters biologically, and so does our individual human diversity.
Identical twins are unpredictable and of an unknown genetic makeup.
Cloning would be a deliberate act to copy the genetic part of the makeup of someone who already exists. We are far more than just our genes, but to control this part of human identity is widely seen as a violation of the God-given dignity and uniqueness of the individual. It also shows an instrumental attitude if it creates a child primarily for someone else's benefit. This is less the case with infertility, but even here no one knows what psychological or relationship problems might result for a child born genetically identical to one parent, a generation older. It would also place pressure on women and men desperate for a child to risk undergoing an unsafe procedure.