I don't think this is a fair question. Just because you (or any single person) cannot think of a reason, does not mean that a reason does not exist. It doesn't mean a reason exists, either. The point is - we don't know. It's a question and needs an answer before we draw conclusions.

Why would someone falsely accuse anyone of rape? It doesn't make sense, but unfortunately it happens.

We operate under the presumption of innocence until proven guilty. So until the case is fully investigated and a verdict is made I think it's important to make the distinction rather than assume that a rape is true just because it's a horrible act.

Why would Uber call in false ride requests to a competitor?