Why should AirBnB offer to replace her stuff, when she made the mistake of not properly screen the person, and left everything free for the taking while away du

Why should AirBnB offer to replace her stuff, when she made the mistake of not properly screen the person, and left everything free for the taking while away during the rental period. Sure, maybe they need better security, but no one forced her to rent out her place, and no one forced her to hand the keys over while she was gone.