Transplants have saved many lives since the science was developed. Although we all have to die someday, why not live longer if you can. All medicine in a way is created to extend our lives. A transplant saving your life is really no different than an antibiotic fighting off an infection that left untreated could eventually kill you.
Transplant technology keeps organs alive outside of the body. Without this kind of technology the organ would "die" and not be of use to anyone. This kind of technology has helped to save many lives and will continue to save even more. Advances are being made everyday in order to make it even safer.