User blog comment:BuyGold618/Paranormal activity in Gravity Falls/@comment-30064728-20170625125900

Though I haven't read many interviews and theories, but this is what I know:

1. This series is about a summer break, a summer break which anyone grows up.

2. About the unimaginable stories in the series, they originated from the wish that Hirsch wanted to experience when he was young.

So, although it's good that you wanted to dig deeper about the meaning of the story, your theories may not be accepted by many fans of the Gravity Falls. You can make a fan-fiction if you like, though.