but they won't

For MAGA, children exist for two reasons. To use as political pawns, or to marry.

Maga has been calling for schools to be guarded by armed security for what 10 years now? The Democrats said that's "Identical to making schools a prison".
That's why maga is more concerned about the safety of our children than Democrats are.

Maga: "Let's post armed guards outside of schools to keep our children as safe as we keep the elites"
Democrats: "No."

If every single person in the crowd at Utah had a gun, exactly what would have changed?

One guy would have shot in the direction he thought the "Charlie" shot had come from, and then somebody else would have shot at him, and that somebody else would have been the target of some other person, and so on and so forth. A real mess.

Well, that was a quick yeet. I wonder if they'll be back with a new account?

Maybe nothing. Or maybe the shooter likely would have stayed away, which is the idea of having armed security: to deter potentially violent threats and then confront those threats if they arrive.