SCPs like this are the ones that truly scare me, not fear for myself per se... but I feel bad for the person/being.
SCPs that are just monsters that want to destroy you, no matter how indestructible or terrifying are easy to understand, at the end of the day they want you dead one way or the other... but the types like this... just imagine... being a prisoner in your own body, at the mercy of a "power" you have no control of and that takes your freedom away in a way you can't resist.