How much would you pay for a treatment to prevent or repair the negative effects of aging? For me the answer is "well over 100% of my net worth".
Specifically manufacturing of medicine is cheap. The R&D is expensive. As such even if the company owning the IP kept prices artificially high. Facilities in Africa, China, India, etc would reverse engineer them and medical tourism would become even more common. This is a constant threat for COVID vaccine manufacturers today. It’s very likely the prices of youth extension are not much greater than the COVID vaccine (I.e. about $20 per dose)
Meanwhile, the population of countries with single payer health care (e.g. Canada, New Zealand, etc), will also reject intellectual property protections for a company halfway around the world. Life extension for the population is more valuable than a few potential tariffs.
Of course the other optimization is forcing everyone to have insurance when healthy and kicking them off when they get sick.
Their point was the high risk versus the high reward. Even if investors gave such money to thousands of longevity startups, would they produce something that makes all the investing pay off better than what they sunk into them? (without pivoting to something other than longevity).
But also, while a lot of the headlines are about living longer, the research is largely about treating aging as a disease, or at least a cause of diseases like Alzheimer's, etc. Even if you don't actually extend human lifespan, you keep people healthier much longer, which among other things has enormous economic value (people don't required as much expensive medical treatment and can continue to be productive for longer).
This is said with an awful lot of certainty for something that's never been accomplished before. Do people and systems get stuck in their ways? Absolutely. But they also change for better and for worse. There's no guarantee/proof that living forever ends in stagnation or an unsustainable culture.
Which society of immortals are you referring to?
More seriously, it's a common theory that age-related diseases are an evolved adaptation because over time a species must form an equilibrium with its resource base.
I don't even think it is necessarily bad in toto. The other pole could look like stagnation fueled by indecisiveness and fear of possible consequences. I definitely know some individuals who spend their lives like that, and they don't seem to be happy.
But the conversation is always "immortal billionaires".
It's a totally fake problem to talk about that.
As for stagnation, there is an unspoken presumption built into your thought, namely that older rejuvenated people will gain younger bodies back, but that they will stay mentally old. I don't think this will be necessarily true. It rejuvenation works, it will have to work on the brain too, and rejuvenated people will revert to younger patterns of thinking as well. Only with more memories and experiences, which could actually improve their results. For example, they will be unlikely to join some populist cause if they burnt themselves twice already.
But another less popular view I have is that many of these people have spent all their life focusing on the things of the world and the money and the grind and the etc, etc. Their focus is on the work the money the grind and so they simply want to continue getting a return on their investment without having it get interrupted by something as pesky as death.
After all no matter who you are Stalin or a poor Russian peasant death is the great equalizer and comes for us all eventually, at which point all the grind, all the work, all the money, doesn't make much different when you are lying in the hospital bed taking your last breaths. The only thing you have at that point is to reflect on your life and what you've done. It is a sobering thought.
But you are right ofcourse. All thats left for us is to decay beneath the soil or burn to ashes.