Even though they would not be able to overthrow the government, they did have the capability to capture members of congress, and hold them hostage, if they hadn't mostly left in the time the rioters were held at bay outside. And there were a few that had weapons. Regardless, this was a weak disorganized and poorly looking response from our government. And the reason it appeared that way was because of Trump's lack of action. Also he willfully didn't act.
This was not a good look as you often point out about other events. This look could embolden others to make better plans and try it again, whether it was other citizens that were unhappy or a foreign government seeing this as a window to exploit. I just don't understand how republicans can excuse this. I will just about guarantee you that if this was a Democrat President who pulled this, there would be a united chorus coming out of the Republican peanut gallery of voters and politicians. And there would be Democrat defectors who were speaking out against it, the same as there are Republican defectors now.
We really don't ever want to be put in this situation, where our congressman are in fear for their safety. We want to be a strong nation that never had that happen, and certainly not in our capital. Until Jan 6, we were that nation.