Because the "true and cursed" immortality is not on offer. Spending resources to extend our life is a possibility. Spending resources to better understand what aging is and how to extend our youth is. Getting cursed with immortality is not in the cards.
> The word immortality has a specific meaning, even if you don’t like what it is.
Ok. You can have your discussion about your fantasy concepts. They are fun! What should we discuss next? How many duck sized horses we would fight just to avoid being cursed with true immortality? It is all good with me as long as we don't try to draw real world conclusions from said fantasies.
That seems to jive with GC's point. The definition is the ability to live forever, not the requirement to live forever.