But come on, something should matter, right?
Well, no. Nothing should matter after death, since death is an ending. I guess the more complete question is "matter to whom"? - since to matter is a question of meaning and value. And value ultimately springs from you, the one doing the valuing.
We're in agreement here - but it's just always so strange to me. There is so much that matters in life - in reality. Why would anyone want to look outside of life and reality for what matters?
So much people do it and look outside what might matters. I think everybody should do what he/she wants to do, but at least it's a bit dangerous. It can make vulnerable to ideologies and dogmas. Better to leave the matter inside live itself :)
Sorry for the shameless self-promotion, but I actually wrote a bit about this too recently: https://steemit.com/philosophy/@jpgaltmiller/meaning-in-a-world-without-god
For me, when it comes to value and meaning, it's not about should, it's about is, based on the nature of the concepts. (If that makes sense.) It's a question of subjects living within an objective reality.