Why does this myth keep being perpetuated? There were barriers up. There were lots of cops across the Capitol grounds. The insurrectionists were organized. If you do a deep dive on what happened that day, say with what the NY Times put together, or the video the 1/6 Committee assembled, you can see how the Proud Boys / Oath Keepers worked in tandem to probe the various entrances, and work to overwhelm the cops. There were pitched battles on each level the cops tried to defend.
Why is it so hard to just blame the insurrectionists? Why is it so hard to blame the guy who wound them up and sent them there?