everybody does? and you die, and thats that? no responsibility, no justice, no morals, no consequences?
that makes you just as valuable as all the dead guys who have died before you. you would be practically worthless.
Morality is a relative matter, what is right is right only because we as humans have decided it to be so.
The consequences of our actions exist here, where they can be used to show a very clear cause and effect senario, for example, if you steal from someone, you might get arrested. Rather than an imaginary consequence no one has ever really expearenced, that being hell in your case.
I personally find the idea that everything on this earth is made worthless in comparison to a god an abhorrant concept, because you might not realize it, but saying there's an eternal afterlife means this life has no value in compairson, and that we might as well all kill ourselves and hope we get into your heaven.