I once saw a citizen with a 6-shooter strapped to his hip at a Colorado county clerk's office peacefully fill out some paperwork for 5 minutes. What does this story tell us about what rioters did or didn't do while tearing up the capital building?
1 minute of Googling tells me that Colorado is an open-carry state, and there is no specific exclusion for county offices, so unless this was in Denver or another municipality that prohibits open carry I don't see the relevance of your story to what happened in the Capitol.
This is why both the local network and endpoints are no longer trusted in security models.
So I think other party stsffers are not trusted to be left alone.
There's lots of stuff you "could" do everyday, but the probability of getting caught is high, the ultimate impact to anyone else is low, and the severity of punishment immense.
All that changes quite significantly when even basic access control is lost and the building is overrun by unidentified belligerents for a few hours. I'm betting a number of foreign intelligence agencies were scrambling to see if they could take advantage usefully.
In this event you don't even know if such authorized persons had time to lock their computers.