That's a good point. When you get to the flare and reduce power on the running engine to land, you can easily fly off the side of the runway if you do it too quickly. You are forgetting how much rudder trim there was. But if you flew the ILS all the way down to the flare, which is what you should be doing for PTS purposes anyway, then you will have plenty of runway left to use to ease out the power gradually and make a smooth counter with opposite rudder.