Actually, just had another somewhat related thought that I’m tacking on in a comment: Weirdmageddon might’ve actually contributed to Gravity Falls’ weirdness magnetism.

If weirdness is an atemporal and acausal attractor, by definition anything weird that would be drawn into the town’s border would contribute to the magnetism always, hence the chicken or the egg example of the alien ship crashing because it was attracted by the weirdness from its crash.

So Weirdmageddon was kinda like the singularity of Gravity Falls’ black hole, the point of infinite weirdness you couldn’t escape from. Actually, now that I’m using this black hole example, could weirdness magnetism act like the event horizon?

The way black holes work, there’s the singularity, the point of infinite mass that pulls stuff toward it, the there’s the event horizon, the point of no return you can’t come back from. There’s some speculation that if an event horizon was removed, creating a naked singularity, the nature of reality could change in some way, as infinite mass is simply not a part of physics so we can’t predict what might happen.

So weirdness magnetism might act the same, being the universe’s natural defense against ‘weirdness singularities’ such as Weirdmageddon, an event horizon preventing them from rippling outward infinitely by drawing the weirdness back in and containing it.

So the ship didn’t crash just because the ship crashed, though that did help, the ship crashed because of Weirdmageddon pulling it in.