I don't give two fucks if it's natural, but I recognize deluded, selfish junkies when I see 'em. The idea is that it's better for 100 people to live 100 years each, than for me to live 10000 years. The idea is to shit, get off the pot, and let someone else have a turn.
Instead of being cancer.
Just like power, longer lives will be utterly wasted by those who crave them the most. The people who would be pleasurable to have around longer, are fine with playing a mere not in a symphony. The people who do want it, are generally too fucked in the head to be allowed to get it.