I don't. Simply for one reason. The whole soul aspect. If it was real. Ghosts would be documented and video taped proving it. Hasn't happened, doesn't exist. What? is there some universal code that prohibited ghosts from interacting with living people. What about alien planets. They would also have that ability. And they would fly around and show themselves by chance. There would be races that would see a ghost/soul as a powerful element.
Engram is just a digital version of the person. Do you also consider a movie not a movie. If it's in a MP4 file, and not on film? You can be copied, yes. Proof from Saburo's actions in the Hanako ending. What about the people who said they lost their soul when photos where first invented? People should be dead by the amount of cameras endlessly recording you everywhere. You're just moved around to another brain. Do you lose your soul the moment a fake body part is added on? Why is the brain the only factor in deciding this? Do you lose your soul. If you brain is transplanted into another body? I'm open to the argument. But you must be consistent with all these aspects from past and present.