Preventing the bad guys from getting on campus is preferable to having lots of guys with guns cruising around.
The former requires the school to be a fortress. The latter is far more cost effective, doable, and statistically proven to be a deterrent
There is a reason why soldiers are not allowed to wear sidearms at the Pentagon and other military bases.
There is a reason that places like the Pentagon & military bases HAVE armed security ON the premises, and not needing to call 911 and wait 5 to 10 minutes for someone with a gun to arrive.
But cudos on painting all the military as some group of unstable gun nuts. I'm sure they'd be greatly appreciative