I generally agree with you, except for the view on class mobility. If we defeat aging altogether, I strongly suspect society to stratify aggressively between those that can afford it and those who can't, and worse, a class of immortal wealth to form. Today, maintaining generational wealth requires A) balancing relatively small family sizes to keep the exponential growth of family members relatively inline with the exponential growth of well-managed wealth against dying off because no one had kids and B) a mostly continuous line of responsible investors. In a future where dying of old age isn't a problem, A becomes much easier and B) is eliminated entirely. It's all the problems of generational wealth with none of the saving graces.
On the whole I think it's worth it, but it will definitely exasperate the problems already inherent to our economic system.
On the whole I think it's worth it, but it will definitely exasperate the problems already inherent to our economic system.