Body shots are a funny thing, they work real well but can be "neutralized" with good arm (elbow) work and conditoning.
I all my kyokushin matches, fought and seen, I recall half a dozen ended by body shots.
Now, for those not in the now, kyokushin is ALL about body shots ( no head punches allowed when fought bareknuckle).
Now, I got more than the average knockdowns by body shots, but that had more to do with my boxing background than anything else.
I know a few guys that take body shots like they were nothing.
However, VS the untrained or rookie fighter, they work very well because not only are they not conditoned, they don't think about them that much.
Most people tend to be head hunters and with good reason of course.
Psalms 144:1
Praise be my Lord my Rock,
He trains my hands for war, my fingers for battle !