The scenario you’re painting is intuitively plausible, which goes mostly to show why intuition is sometimes a poor guide. Any attempt to defeat death must necessarily make people healthier and keep them young.
Which is not to say it’s impossible, but it’d almost have to be deliberate...
“Preventing death but not ageing” is not carving reality at its joints, when the main cause of death is ageing.
The scenario you’re painting is intuitively plausible, which goes mostly to show why intuition is sometimes a poor guide. Any attempt to defeat death must necessarily make people healthier and keep them young.
Which is not to say it’s impossible, but it’d almost have to be deliberate...