Actually it's only a problem if you're REALLY wrong. If you're just a little bit wrong, or your manager was only just barely right, it's likely that your manager will be reprimanded instead of you.
Further I think half the point of the exercise is to help ensure that managers don't dismiss people's concerns. If you want everyone to take launch safety really seriously broadcasting to everyone that you can go above as many boss' heads as necessary to get something addressed should help keep everyone on their toes.