Why the pediatric dentist office won't allow me to go back with my child?

I'm just wondering if anyone else has had a dentist that didn't allow parents to go back with their child for 'privacy' reasons.They said it was their policy because they have everyones charts open and don't want to take the risk of being sued because their chart was read by an outside party.I took her here because one of my customers at work suggested it.The first time we went, it was very scary for her and she begged me to go back with her. I knew I couldn't.She finally agreed to go back there without a fight but as soon after, they came to speak to me about this 'papoose' thing they were gonna need to put her in for her safety and their own.They said she had a tantrum in the back. I didn't want to let them put her in there, so I told him no and then a nurse came in and said they got her calm finally.Everything went smoothly after that.This go-round she has to have a crown on her cavity and I know she's gonna be afraid.Has anyone ever experienced anything like this before? I haven't!