I too live my life in constant fear of break in
I think you are missing the point. Right now I don't have to live in fear. I have the tools and the training to smoke check anyone who comes around looking to rob, rape or kill my people. The problem is, a lot of people are trying to take those tools away from me. They want to deprive me of my right to self defense.
Those people largely don't know anything about violence, guns or self defense. When they debate gun control they talk as though violent crime is always a one on one scenario. They say you only need a shotgun, they say you only need 7 or 10 bullets. They act as though every bullet you fire will hit it's target with no misses. They act as though every bullet that hits the target will instantly kill the bad guy and end the threat. This couldn't be further from the truth.
The bad guys are not interested in getting in any fair fights. They are looking for victims and they frequently work in groups. They act quickly and violently. I live in a place that has close to the highest kidnapping rate in the entire world. An AR15 is a force multiplier. People often make the stupid argument "why do you need an AR15". This is why.