A while ago we decided that meta-answers like
"because it's a story"
aren't welcome on the site;
To be blunt, there's absolutely no point to this site if answers are going to be "It's that way because that's how it was written. Go away." Such answers should not be welcome regardless of how any question is phrased.
Why then was my flag as "Rude/Abusive" on this (heavily downvoted and now moderator deleted) answer declined?
For those with less than 10k, the answer is quoted below.
Because it's fiction.
Here are some more characters to exceed the minimum limit of 30. You know, stackexchange, as a scientist, SHORTER answers are preferred to LONGER ones. This is because the discovery of truth needn't be longer than necessary, else we run the risk of wasting people's times for the sake of verbosity. But hey, what do I know?