There is enormous variability in how hard a tool is to use correctly, how likely it is to go wrong, and how severe the consequences are. AI has a wide range on all those variables because its use cases vary so widely compared to a hammer.
The use case here is police facial recognition. Not hitting nails. The parent wasn't saying "AI is a liability" with no context.
When somebody uses a tool to hurt somebody, they need to be held accountable. If I smack you with a hammer, that needs to be prosecuted. Using AI is no different.
The problem here is incidental to the tool; it was done by the cops and therefore nobody will be held accountable.