If she used her key and the door was open so the key didn’t have resistance and the door swung open it surely would reinforce thinking it was her own door and she was being robbed. Same if the door was already slightly ajar when she walked up to it. Have to think a locked door keeps things like this from happening the vast majority of the time. Ten years or more sounds fine to me. Have to wonder what else has happened in the course of her career that points to gross negligence. Not that the victim is to blame at all, but it is a lesson to secure one’s home. Even a chair under the knob or a wedge in the gap if your door won’t lock when you are home.
Freegards
A law that allows repair by the tenant if the landlord refuses to repair the door in 24 hours and deduct the cost from rent.