Just my opinion but I feel thats an incredibly naive and over simplistic view, criminals arent just going to be scared of guns or dead theyll just tool up for the job and shoot first. Dont get me wrong Im certainly not against firearm ownership as that would be hypocritical just the more guns the safer you are is a provable fallacy.
Just like they aren't scared of anything else, but at least owning a gun gives you a chance. When you get assaulted by a psychotic maniac he will try to kill you anyway. If he finds a rock he'll keep hitting you with it until you're dead. What would you rather have for defense? A knife or a gun?
Edit, just for a successful recent European resistance against govenment slavery: The absolute fuckery caused by the yellow vest movement without a shot fired beginning 2018 France. If that population was armed imagine the bloodshed, it only takes one ND or unstable person to result in armed conflict.
It's estimated that there's about 20 guns per 100 people in France. This means that 20% of yellow vests have access to guns. That's a lot. Why aren't they shooting? Why aren't they killing the police? It is your understanding of the situation that is wrong.
For instance, that migrant who chopped off a guy's head in the street didn't have a gun. He didn't need one.
Or that guy:
https://www.express.co.uk/news/world/766184/migrant-attack-germany-berlin-beheading-ritual-killing