Exactly. I’m 63. I have an autoimmune disease, and am a cancer survivor, but I’m reasonably healthy, am enjoying life, and there is no way I would choose to die at this point. If it happens, it happens, but I’d rather stick around.
That's the thing. I would choose the same, and I know many others who would. For the people who would prefer to live what they consider to be a "normal" lifespan, they can simply choose to end their life when they want, or not avail themselves of whatever treatments become available to increase lifespan.
So many "anti" arguments against so many things boil down to "I wouldn't want that so you shouldn't get to have it either". Those arguments are tedious and annoying.
The existence of civilization is the proof that not everything is lost when we die, at least not for everyone.
Nonetheless, learning is still a long and painful process, even when it is about knowledge that has been known for centuries. And when a master in a field dies, his unique mix of knowledge and views dies with him, without any ways to transfer it.
Human language is a powerful tool but still weak and unreliable to transfer knowledge.