That's rude. She has many friends and sees kids her age almost everyday. She's too young to be unsupervised.
Let me ask you a question similar to what you just asked me, "Do you enjoy letting your family breathe the smog and pollution infested air that you live in? If they don't breathe the outside air, are they aware of the pollution and climate change that is killing the planet, caused by your car?" See how silly the kind of assumptions are that you made?