You're right. Home defence isn't scaring away the Hamburglar with a shotgun cocking noise, like a lot of people seem to imagine it. Home invasions commonly involve 2-4 armed and aggressive men and you have to either outgun them immediately or end up raped. https://twitter.com/TaraLaRosa/status/1299250428589285377

The common modern home break-in method is: get four guys with guns. Kick the door in as fast as possible. Shoot or subdue everyone in the house. Smash and grab. Do a rape or two on the way out.

Anyone who tells you all you "need" is a shotgun or handgun with 6 bullet in it has absolutely zero idea what they're talking about.