There is a difference between dying at 40 and dying at 80. Also, I see no reason why people couldn't live for, say, 200 years or even indefinitely. I think it is an engineering problem that can be solved and I wish we as humanity allocated more attention and resources into solving this particular problem. Especially as it concerns all of us. Solving suffering and then solving mortality sounds like a good project to me.
If life's a game where you try to get the best score you can, more years gives you more chances to rack up points. Philosophically* there's nothing more important, and therefore nothing has more meaning than this.
* different people can have different philosophies on life
