I do think there's a different emotional response to accidental pain and pain deliberately inflicted by a (previously) trusted person, even for little children.

I do think there's a different emotional response to accidental pain and pain deliberately inflicted by a (previously) trusted person, even for little children. If a child falls off his bunk bed and needs staples in his head, there's no relational harm from the incident. If anything, a caring parental response makes the child feel safer, knowing someone will intervene on their behalf to take care of them when dangerous things happen.