They are willing to cooperate with the police. They just don't file the complaints themselves. I would say this is reasonable since it is the policy at all companies I have worked with as well.

Any charge of employees doing criminal acts are reported by those who see them. If no one else at the company sees it, then it is left up to the alleged victim. They company does not want to be seen as attacking it's employees based in hearsay.

In Ubers case these aren't even employees so they are left carrying hearsays to the police against third parties.