Absolutely untrue, and has been for decades. Their hesitation to react and go in is the complete opposite of what they were trained to do, which is go in and eliminate the threat immediately. "The official narrative has shifted from a story of swift response by the local police to one of hesitation and delay that deviated from two decades of training that instructs officers to quickly confront a gunman to save lives, even at a risk to their own."[1]
>These aren't unfortunate dolts who bumbled into a tragic response because they weren't equipped to deal with it.
Except that, from everything we've learned about this event in the weeks since, they literally were not equipped to deal with it. Police chief didn't bring a radio, their own radios didn't work in the school, they bungled getting a key to the room, they didn't have their tactical materials arrive in a timely manner, I can go on and on.
[1]https://www.nytimes.com/2022/06/09/us/uvalde-shooting-police...