dybmh
ויהי מבדיל בין מים למים
This actually an interesting idea. To be clear, you're departing from scripture. The verse makes no qualification based on how long the individual lives.If a man lays down his life for a friend, the friend will live a few more years on earth, and be thankful. But Jesus did not lay down his life so that his friends could live a few more years on earth! He laid down his temporal life in order to provide eternal life to those who would follow him.
But, ignoring that, it's actually a much greater love to sacrifice one's life knowing that one they're saving has a short limited life span.
Think about it. How can we describe it? A young person who has a long life ahead of them, sacrifices their life for an elderly person crossing the road, compared to an older person sacrificing their life for an infant. Who had the greater love? The younger person, right? Because they value the other person's life over their own even though it's brief.
And this ignores that Jesus didn't really sacrifice anything, if mainstream Christian theology is true.