Answer:
it's not because existence is an ever-growing hole of death and despair.
Step-by-step explanation:
The universe will consume all that it has created. Matter itself will stop moving, all energy will cease to exist. All that will ever exist and have ever existed will be destroyed. The infinite matter will recombine creating another big bang, and subsequently, a new universe. A universe without knowledge of us, likely there were infinitely many before us that we could never know. But don't feel bad, you won't do anything substantial anyways!