Love of life is not the same as fear of death. If the latter is what drives the search for longevity then it will never be enough. So long as longevity isn't used to find peace with life and death, and transcend our limited perspective on life then I see it as just a frantic attempt to delay the inevitable. Resisting death at 150 will be just as painful as resisting it at any other age. If on the other hand it will give people more time to gain wisdom and perspective on what life is about then that's a whole different story.
Assuming it's like any other product or service, the people that implement longevity (if they do) will be a tiny fraction of the general population, and certainly not a random sampling thereof. Most people who end up being able to make use of longevity treatments will have had nothing to do with those who implemented them (except by working for company A which made product X which was used by company B to make ... which was one of the components the longevity researchers used); I think it'll happen regardless of their opinion about it (well, I guess if they violently opposed it, maybe they could stop it).
So, it's less a question of what drives the search for longevity than what we'll do with it once it arrives.
