Maybe it is possible to have tunnel vision on landing but I don't think most pilots do. I have never seen it. In over 17000 hrs of flying the airlines I have never taken over the controls except once which probably would have damaged the plane. It is demoralizing to the other pilot to do so. I would rather take a hard landing than ruin his day. Going around is pretty simple, add thrust and pull the nose up. I don't think many pilots would have a problem with that.