We don’t know how the femur broke, I suspect it was likely a collision with something, otherwise it would have been noticed. You think the staff were knowingly neglecting a broken femur for the lulz or something, despite how very, very badly that would obviously end for them? I doubt it.

Sorry for upsetting you, but life isn’t simple. We don’t gain much from simply trying to identify some sort of bad guys and then blindly raging against them.