The conclusion of your argument is that nothing less than immortality is acceptable. What's the difference between 70 and 700 years? If anything, the loss should be all the greater at 700 -- losing 700GB hurts way more than 70.
Check it out: I would have loved Charlie Parker to have lived into my lifetime so I could hear him play. Same for Brahms, or even Bach. That doesn't mean that their passing was "wasteful" -- instead it encourages us to celebrate that they ever existed in the first place.
The uniqueness of a human's achievement is not invalidated or "wasted" by their passing.
Yes, those who pass are lost, and all their precious thoughts and unwritten masterpieces are gone forever. But "wasted"? The definition above says "carelessly, extravagantly, to no purpose". Death is neither "careless" or "extravagant" but simply the inescapable truth that all things must pass. Whether it has a "purpose" is a religious question.
Just because death is terrifying and a total drag, doesn't mean it doesn't have an important role in the totality of our existence. It's part of the picture, reminding us that we're just animals, no matter how bright our shiny toys are.
Importance doesn't imply goodness. WW2 was important, but it was still a waste; we didn't learn anything from it that our best people didn't already know.
So what is the point of letting people die? What _reason_ do you have to do it? Some vague appeal to nature/tradition isn't going to cut it.
Check it out: I would have loved Charlie Parker to have lived into my lifetime so I could hear him play. Same for Brahms, or even Bach. That doesn't mean that their passing was "wasteful" -- instead it encourages us to celebrate that they ever existed in the first place.
The uniqueness of a human's achievement is not invalidated or "wasted" by their passing.