Because living longer is a huge drain on resources that could be better spent on other things. End of life care is expensive and rarely results in a "good" life for the the life being extended.
Only in places like the US, which is out of its mind in this regard.
In most other western countries, they just let (old) people with terminal conditions die.
> living longer is a huge drain on resources that could be better spent on other things
That's not right. Any living is a drain on resources and draining resources is the issue not the living. More broadly we need to use less resources or manage them better and there are much better ways in doing that than reducing life.
So I think curing means basically opt in death or something like that. Right now extended life is bad because the person isn't in his prime but curing aging is basically gonna keep him in his prime. This might be what they meant.
