No one believes that Older Detective has telephone prediction powers. That's not what the game seems to imply there, either. But most people
do understand that the translation comes off as nonsense because it doesn't properly convey, at all, what Older Detective is actually saying. The meaning from the Japanese scene is completely lost, and left with a mess which makes English players scratch their heads.
If it came off clearly to you, that's great (and I'm not sure how it could, since the game makes no effort to imply that there was a previous phone call). But most players have the
reaction Jeff did at 23:44. It makes no sense, and that's what makes it one of the worst examples from the game.