So, like, think about this:
You bump into a dude on your way home, and drop your bag. It sticks in your mind because he was dressed exactly like you were. Later when you're in your place, you look in the bag and it turns out to be a very precise replica of yours, all the stains and patches in the right places, but there are no holes under the patches, and the stains smell like paint instead of blood and grease. It's full of things that look like your things, but aren't: an empty locket, a notebook well-beaten on the outside but filled with blank pages, a penknife without a sharpened edge.
There's also a small pile of drawings. The fortune's worth of paper notwithstanding, they are shocking: they're beautiful, meticulously observed scenes from your life. You remember that oddly-shaped vegetable you found at the market the other day. You remember your struggle to find pins to hang all your clothes on the line. These are the works of a genius artist. Only, in all the drawings, he's in the picture instead of you.
That's weird!
It's at the root of the Weird stat, too: all the Weird-focused playbooks are about the basic not-okayness of humans. The Brainer is every abusive girlfriend ever—the Hocus is every quack faith healer and BS-spewing TV preacher.
But they've got powers for some reason!
I dunno why that is. It seems to put a lot of unnecessary distance between their weirdness and their emotional importance. Plus, opening your brain is just kinda weird. I dunno. Why does the Weird stat give you crazy powers? Why doesn't it just, say, allow you to overstep your social inhibitions?