You could be wrong about the afterlife, SC. I don’t know why , but don’t believe you could know that. Heaven and Hell and reincarnation and other ideas are pure guesses, even lies gradually forced into articles of faith, but so is it to say , there is no afterlife.
A million people can agree and hope and pray that there is no afterlife, but it doesn’t make it true. How goofy we are, or all the goofy notions past humans have come up with doesn’t prove anything about a post death situation of individuals, dogs , cats or any other living thing.
We can speculate on what the quality of a potential afterlife would be, I never come up with anything very good or comforting at all really. You can’t really say the universe and life is a cosmic joke and claim to know that joke doesn’t mean you go to Disneyland when you die.