There are some things people won't do to live longer, after all. Yes, we'll slam down melatonin, DHEA and random antioxidants by the fistful just in case they slow aging. I have also heard men complain about how unfair it is that women live longer on the average. Yet although it has long been known that castration can extend a man's life span by an average of 14 years, guys consistently pass on the chance to even the score. These life strategies are called r selection and K selection, and there's nothing so unusual about a species becoming more or less K-selected.
Immortality is something different.
Then there's the matter of addressing ethical conflicts before we proceed. The track record on this is not so great. Conferences are held and panels meet and people go right ahead and do what they want. And people really really want to live. Oh, and the ballot box.