No, no, and hell no.
Our active shooter response, in the school district I work in, are strictly designed to minimize casualties, not to prevent or stop a shooting.
We still have multiple access points to the building, yes the doors are locked but they are glass. We have one SRO, who has to cover multiple schools, and faculty isn't allowed to carry.
The choices that were made are a balance between responding to the concerns and keeping the mob happy. The decisions that should be made are the ones that provide the highest probability of keeping the school safe.