How many generations have grown up believing that modern medicine would save them from ageing? They've all been wrong so far, to some extent. There will probably never be a "eureka" moment where lifespans multiply tenfold and the effects of old age never kick in. All of us will have to deal with either getting old or dying young.
Mokalus of Borg
PS - Though, actually, nobody has to deal with dying young themselves.
PPS - As long as it's sudden.