I've never understood why in "Home Alone" after Kevin says to his Mother (Kate) I wouldn't be sad if I woke up tomorrow morning and didn't have a Family, Kate says "Say it again, maybe it'll happen". Why did she say that? Was it planned or was she trying to say be careful what you wish for?
This kind of thing is not meant to be taken as a clue that something has been deliberate. The conversation is just a humorous example of Forshadowing a literary device where the writer hints what is to happen later in the story.