That's a good life. In a limited sense, that's true. But if we have a soul and there is such a thing as eternity, then that changes the picture entirely. Eighty years in the face of eternity is not such a big deal. From Judaism's perspective, our eternal soul is as real as our thumb.
Ultimate justice is found in another dimension.
But the concept goes much deeper. All I'm trying to point out is that the rules of life start to look different from the point of view of eternity, as opposed to just the 70 or 80 years we have on earth. When a person dies and goes to heaven, the judgment is not arbitrary and externally imposed. Rather, the soul is shown two videotapes. Every decision and every thought, all the good deeds, and the embarrassing things a person did in private is all replayed without any embellishments.