What's the point of the question? What would you argue? Yeah, obviously everyone dies, but when is the important part. It's generally agreed that shortening someone's time to live is one of the biggest offenses possible (if not the biggest). How does that question change that notion?
It directly implies that if we prefer dying later to dying sooner (in almost all cases) that older peoples lives would have statistically less value. Which is anathema to many Americans. The only way around it is to say you are indifferent to when death is for people, which is also anathema to a lot of people. It’s a paradox of our ethical system.
If you consider that shortening someone's life is not a continuum but discreetly bad, then there is no paradox. Moreover, I consider that to be the only ethical way to view it. If you take the life expectancy of the victim when judging the killer, you may find yourself giving lighter sentences for those who kill impoverished people, who have a shorter life expectancy, than those who kill rich people.
Yes, it is less of a tragedy when an old person dies. Old people have less of their life to lose and have less remaining potential to contribute to society. The death of children is always more tragic than the death of elderly people.
This isn't a perspective exclusive to young people either. Last year my grandfather died and my cousin had a miscarriage. My grandmother was far more distraught over the latter because she understood that her husband, who she'd loved for nearly 60 years, had already lived a full happy life. She said as much explicitly.
It may be a cultural thing too. It is a lot faster to produce young unqualified people than a really senior person. We are losing minds like John Conway.
Anyway, I'd say my grandfather and cousin deaths (non-covid related) had about the same impact on me. Dying is the tragedy of being alive, I suppose.