Access to “high end” care (which I suppose would be one) is already high cost which is not that accessible even with technology presence.

As of 2019 1/3 of world’s population doesn’t have access to clean drinking water. Would they be glad that instead of clean water and sanitary conditions they were granted endless life?

It’s nice to focus on optimistic outcomes but except for genius scientists world is full of mobsters, greedy bankers and ruthless corporation heads. They’d had a chance for longevity way sooner than the best of scientists (who have “infinite memory” trait, which isn’t true even for the healthiest of humans).

Sure, we’re speculating (and it’s fun) but I’d invite to mix at least 30% of “what could go wrong” as part of the context.

Let’s have a thought experiment: who would be the first to get such treatment - Nobel prize winner or a dictator? What would be the route, who would pay for that, would they even want that (as that’s not guaranteed).