Oracle is responsible for Cass' well-being. While no legal adoption had taken place-- probably because legally Cass doesn't exist-- I don't think it's a far stretch to say Babs is acting as a surrogate mother-figure.

If you're a mother, and your child doesn't have a skill that could save her life, and it's a skill that you have the ability to (attempt to) teach her and/or the resources to get someone else to help teach her, and you choose not to do so, it's not the CHILD that's behaved stupidly here.