Comment by Mirioron

Why do you take this so literally? If you don't regularly run does that mean you're incapable of running? No, it doesn't. It means that you're not as good at running as you could be if you practiced more. The same applies to this.

If a kid is willing to take hypothetical scenarios seriously in a story I'd be willing to bet money they're more willing to take other hypotheticals seriously too. Moral reasoning tends to require hypothetical scenarios. If the other party isn't willing to engage in them then you can't make an argument based on them.

I'm simply saying that these stories help you take what if scenarios more seriously.