Death comes to us all regardless of what we do. No matter whether we're good or bad, whether we're selfish or charitable, whether we live healthy or like a slob. Death is waiting in the wings for all of us and we all end up in the same place. What does it matter how you get there? And as far as legacy is concerned, what does it matter when you're not even there to enjoy it?
I don't know how nihilism isn't what everyone is feeling, at all times. I don't get positive, happy people. They're just living a waking lie.