We might actually not know why magnets work.
The formula used to prove the functionality of magnets can also be used to prove the existence of a theoretical state called a monopolar magnet - positive or negative on both sides. So either monopolar magnets can exist, even if in some esoteric circumstance, or we don't know why magnets work.
You know, it's kind of like Bigfoot.
In the 60s I'd say you could almost slightly believe that just maybe there's a big gorilla somewhere that's so remote that nobody ever discovered it.
These days just about every frickin dirt road in the woods has a trail camera on it, lots of houses have surveillance cameras, drones, satellite images, all that stuff. And not these old Polaroids either, not film developed in a darkroom with a shoddy enlarger, HD digital is pretty much standard for all devices.
There's just no damn way this thing could be walking around without something catching it on 1080p video.
Well I imagine it's gotta be the same for the sky. Military's got a lot of eyes on the sky for a lot of reasons.