This is a fascinating article. It talks about how anesthesia was once condemned as wrong and immoral, because people believed that pain was a natural and inevitable part of life. Stopping that pain was sen as 'unnatural' and therefore immoral.
Even today, people still oppose new technologies because they are 'unnatural'. I do believe that we should be careful with new technology, as it often has unexpected side effects, but it is madness to equate 'natural' with 'good'. Life in a state of nature is nasty, brutish, and short. The entire purpose of civilization is to overcome the limitations of nature and build a better life through technological and cultural improvement.