Because with only one shot, almost everyone is trying to figure out what happened, and why?
That is the way the real world works.
With only one shot, no one knows immediately if someone was hit, if it was an accidental discharge, if someone is wounded, how bad it may be.
It takes time to process and figure things out.
This was the one shot fired in the whole Capitol protest.
Maybe whern Martin Luther King was assassinated, but Babbit was shot at close quarters with a half a dozen grown men surrounding her ... a couple maybe a foot away from the projectile .... and not a flinch ....
Ashli dropped unnaturally like a rock