See, causing a feeling of dread and making someone more susceptible to emotional stimuli doesn't seem nearly as OP as what happens when you're compelled to LOVE someone. 

Being forcibly seduced by someone has so many psychological, physiological, and biological changes that I can't even begin to list them all. 

Your entire demeanor changes, your behavior, your personality, your posture, your voice, your thought processes. So many things are changed through being forcibly romanced.

And the worst part is, most of the time, when a person is romancing someone, they don't think rationally at all. 

On top of all that, it's super-duper creepy.