You are too stupid it’s not even funny. You watch too many movies. By your logic it’s O.K. to have this carnage because responding would cause more deaths. You cannot name on scenario where this is true.
Thanks for your child-like response.
An officer moving into the classroom has to identify the location of the shooter, move into a stance to engage, and fire.
A shooter in the classroom only has to hear the door and aim at the entry way.
If the officer is right handed and has to turn hard right to shoot, it will take him a moment to do so. In that moment the perp will fire five to seven rounds into the officer.
The officer trying to get off a shot may be hit as he fires, causing his aim to go off target.
Speaking of too stupid it’s not even funny, you don’t have a clue here.
This isn’t a video game. It’s real life.
In the scenario I laid out for you here, there are two problems. One, the officer is dead. Two, errant shots could take out another child. And then the shooter would proceed with what his intent in the first place was.
All you have achieved here is adding one or more to the body count, and not ending the shooting at all.