Estimates of child abuse range from 10-20% of all school age children in the UK. Any person who is working in a classroom (including TAs and volunteers) has had some amount of safeguarding training to help mitigate the risk of harm to children.
It is literally our/their job to help prevent or mitigate harm that might come to children in their home lives, and teachers, admins, and safeguarding leads make decisions every day based on a clear and well-monitored framework to do so. This decision, made by people with little or no experience in the field, spits in the face of all of that.