We have no indication of an afterlife, and no indication of how to determine what happens to us if there is
an afterlife. This makes preparing for one a pointless task.
Yes, if the options are "either you accept Jesus and nothing happens, or you accept Jesus and get glorious Heaven, or you don't accept Jesus and nothing happens, or you don't accept Jesus and get horrible Hell," then accepting Jesus looks fairly appealing. But this is not actually the reward structure, because it assumes that accepting Jesus might help but cannot harm
your prospects in this unknowable afterlife. This is not a viable assumption.