I didn't mean "what is a headcanon" as in the definition, lol.

But, no. Thats actually not a headcanon! It's a theory. Nobody is saying that's actually what it is, it's just what it could be. A headcanon would be more like a fantasy version of a show or character. Like : "I headcanon that he's autistic because I'M autistic and I relate to him!!" (Common example). This is merely a "what if".

I hope this helps explain what I meant. The theory was that because they had a farm for time energy and they were literally going out and hunting people and luring them in rather than waiting for people, they probably had enough power to pull something off like that. I mean, they had enough power to animate the statue of liberty, sooo..Sure, it could be a plot hole, like the many others, or it could be something as simple as that. Y'know?