What is the purpose of cloning?

The biggest advance that cloning could help with is creating healthy organs for people. This is not creating a whole person to harvest the organs. A heart can be grown from a person's own stem cells. This heart could then be transplanted into that person and they would not need to be on Imuno-supressive drugs for the rest of their lives, and would have no worries of the body rejecting the organ because it is that person's own heart regrown. This alone could save millions of lives. People would not have to sit on waiting lists hoping for someone else to die so they can live.