There isn’t? I don’t think you’re considering the mental impact of that sort of preparation and drilling. Particularly on young children. Particularly when it hits the more extreme simulation end of the spectrum with role played shooters and trying to trick classes into opening doors with screaming classmates outside.
For example:
https://www.nature.com/articles/s41599-021-00993-6
I’d expect people to deflect, minimise or argue that the trade off is worthwhile but blanket denial is pretty odd given the circumstances. There are after all plenty of articles interviewing parents and kids who have been affected as well as research.