Epilepsy and non-epileptic or dissociative seizures (FND?)

I don't see any difference between this and the Scientology Thetans-inhabiting-the-body thing. It's literally the same idea, a deus ex machina without substance.

How did such ridiculous ideas ever got taken seriously? Let alone continue to be. Emotions being stored in the body? Ghosts of aliens past stored in the body? There's no difference here. It's the exact same thing for all practical matters.