Here's a scenario. You are flying along under VFR and encounter deteriorating weather. You decide to land in a field adjacent to a bridge (legal because you are exempt the 500 foot rule).
The conditions rapidly improve. You lift to the hover and hover taxy under the bridge. You can't ground taxy because the surface of the field is too soft. You cannot go back the way you landed for any one of a number of reasons
Having done so, you take off again, from the other side and continue on your way.
Have you actually broken the law?
