I do not understand well the unleash an attack move.

I do not understand well the unleash an attack move.

I do not understand well the unleash an attack move. On a 10+ I do not get hit and on a 7-9 I can choose to be put on a bad spot instead of being hit. If I keep choosing that option I can only be damaged on a 6- which I think is a little abusive. Is the I am put on a bad spot supposed to be chosen only once until I fix the situation so I can choose it again or what?