If a friend told you that he prays every day to his dead great grandfather, seeking his great grandfather’s assistance in this life, and, to prepare a place for him in the next, you would refer your friend to a psychiatrist.
So why do you pray to a man who has been dead for 2,000 years?
It’s an ancient myth, friend. It isn’t true. There is zero evidence for this belief other than generalizations and assumptions about peoples’ behavior twenty centuries ago, and, second century hearsay.
It’s a silly, silly story.