I completely agree with you, with one exception. It's easy to see the absurdity of an armed population against a government with a military at its back. Of course the United States was founded by this very contradiction in intuition, but a more modern event is probably a better example. We destroyed Iraq without difficulty, yet never managed to control it. The full force of the US military backed by literally billions of dollars a day, and the best training money can buy, was unable to stabilize control against disparate groups of poorly trained, poorly funded, insurgents armed with little more than 50s eras rifles and some rudimentary homemade explosives. Think about how remarkable it is that these disparate individuals managed to force our military to huddle into small isolated 'green zones'.
The point here is that there's a difference between destroying a location and controlling it. Of course an armed population is not going to stop aerial bombardment and mass destruction, but at the same time it's practically impossible to control a territory when there is a hostile armed population. And there are also morale issues. The government doesn't own the military. Even the military doesn't own the military. The military is made up of real people who, though trained to act as a group, are still independent actors. And when there is real resistance between a population and a government, you can't rely on the military to behave as you might like. Once again - Iraq and the general failure of the Iraq military to enforce western interests is a perfect example here.
Ultimately there is a reason that governments who expect there may be major resistance to future actions tend to work to ban gun ownership. Mao took control of the government by arming a population, and then went to every effort to disarm that very population before engaging in actions leading to the deaths of tens of millions. Shortly after the Bolsheviks overthrew czarist Russia through force of arms - they began working to seize arms from the people. Stalin was already well entrenched in the nation and his actions, once taking absolute control, would come to cost the lives of tens of millions. And perhaps the most well publicized example - Hitler seized all arms from Jews in 1938. The holocaust started 3 years later.
Venezuela banned gun ownership/sales in 2012. This was likely done at the behest of then vice president Maduro. Chavez was terminally ill and would die several months later. It was supposedly done to combat Venezuela's rising murder rate. This [1] is that murder rate. It didn't stop the criminals from having guns, but it did stop the citizenry. Despotism and gun control are invariably tightly linked. So, at the minimum, I think we would be in a different place today if Venezuela did have an armed citizenry. While it's impossible to predict exactly what effect this would have culminated in, I do not find it absurd to suggest it would have been better than the present.
[1] - https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/19...