Actually, it depends on the state, city, county you live in.
There was a story I read, over 15 years ago, about a guy who lived in a suburb of Seattle. He had just gotten an alarm system put in his house, after being broke into. He came home one day and caught some kids in his house. They ran out the back door. One of them he shot in his back in the guys back yard. When it all came to trial, the owner was innocent of any wrong doing.
As far as the claim:
Fact is, more times than not, tragic accidents occur instead of a real bad guy getting what he deserves.
I'd like to see where you're getting this opinion from.
The fact is that doctors kill more people every year than guns. So do prescription pills when taken as prescribed.
There was a website I used to read that was libertarian. Daily, there would be an article about somebody who prevented a crime because the potential victim had a gun. Then there are all those times where a gun owner prevented a crime by having one, but that isn't news worthy.
The anti-gun propaganda is based on lies, assumptions and distorted data. If you want real data about guns vs. crime, read the book by Lott, "More Guns, Less Crime".