Moreover, with the vast expanse of the universe a longer life would still be met with the vast unknown.
For our current limited lives the idea of an endless expanse is often filled with ideas of heaven or the afterlife.
For people with lifetimes that we cannot fathom, exploration will be the "endless unknown"
If there is truly anything that has driven mankind for the better it has been exploration and curiosity. It seems only when we are cornered or stuck in one place that evil spawns within us.