Yes, you were a bad parent for not keeping a helmet on her head 24/7. I assume you did at least have her dressed in her full body armor. ;)
Your story reminded me of one of my own. When our son was a baby, his daddy was playing with him and swooped him up right into the ceiling fan. Son's head was strong enough to stop a fan. No tears.
I know it's not funny but it does make you kind of laugh after you realize everything is ok, doesn't it?
I stopped, looked at her like "Oh no!" and she just rubbed the back of her head and starred at me like "You a-hole, that hurt." but didn't wimper or anything.
I would let my daughter play in her crib for a bit after she'd wake up from a nap. One day as I was walking down the hall a hellacious smell greeted me. She had taken her diaper off and played in her poop. I learned a fast lesson on that one.