I sincerely doubt the average first world person has what it takes to sacrifice their comfortable life and go live in caves to resist a tyrannical occupation. And there's no need for them to do that, realistically.
Why are you talking about the "average first world person"? IIRC, Afghanistan is a country of ~30 million people, and the most recent estimates I saw said the Taliban only had ~75 thousand fighters. That's 0.25%. So not even the average Afghan did that.
Also, guerilla warfare isn't so much about living in caves as melting into the population.
Or, as in Afghanistan, actively supported by the population who hated both the occupiers and the VICE (Vertically Integrated Criminal Enterprise) known as the government.
In a dictatorship, yes.
On the other hand, quite a few authoritarian tyrannical movements started by arming themselves and taking it on themselves to get power. Both nazi and communists started as private citizens arming themselves and causing fights in the streets or robbing people.
"On Nov. 11, 1938, the German minister of the interior issued "Regulations Against Jews Possession of Weapons." Not only were Jews forbidden to own guns and ammunition, they couldn’t own "truncheons or stabbing weapons."
In addition to the restrictions, Ellerbrock said the Nazis had already been raiding Jewish homes and seizing weapons.
"The gun policy of the Nazis can hardly be compared to the democratic procedures of gun regulations by law," Ellerbrock told us. "It was a kind of special administrative practice (Sonderrecht), which treated people in different ways according to their political opinion or according to ‘racial identity’ in Nazi terms.""[0].
[0] https://www.politifact.com/factchecks/2015/oct/26/ben-carson...
I think the people seizing those weapons should be less concerned about "average" gun owners, and more worried about fringe citizens willing to die to detonate a high yield explosive in the centers of power.
That’s why federal legislators freaked out when a few thousand pissed off voters simply walked into the Capitol without permission - and without weapons. Every one of those mostly peaceful demonstrators represented a thousand equally angry, and well-armed, citizens not visible on security cameras.