Cloning is an affront to human dignity. Usually people who make this argument are unable to explain why cloning offends human dignity. The argument is supposed to be self-evident. The argument is reductionist and itself an affront to human dignity. Cloning is unnatural.
Nature creates clones all the time, as identical twins.
Twins ordinarily think of themselves as individuals, not as carbon copies of someone else. Identical twins differ in many respects. An embryo may divide at any time up to about 14 days after conception. Even conjoined twins are different from each other. One was a depressed alcoholic, the other a cheerful teetotaler.