Because you have the feedom to?
Road,
First, as a free citizen, you can.
On my standpoint and experiences (Los Angeles) and other major cities in California...I have had guns pointed at me on more than a few occasions. I have had persons try their best to do me bodily injury...and some situations have been in the "good part of town." Remember...bad guys have vehicles too.
That's bad enough, both my daughter and my wife have had a nut case jump out of his car and come menacingly with a tire iron in hand towards the car that she was driving. He stopped when she hunkered down behind the steering wheel and had her gun ready (not visible to the BG)
My wife worked in a credit union where there were 7 armed robberies over a 2 month span with the guard getting pistol whipped several times. then sthey fired shots into the air (I think they were practicing on this place.) The times that she could? She accessed her firearm...sometimes she hid out waiting for the BG's to come into her office...ready to defend herself.
I lived in a neighborhood nearby to Watts when they had the Watts Riots. I could hear the gunshots and smell the smoke from the many fires.
I lived in East Los Angeles when they had the East Los Angeles Riots. We could see the CHP zooming by to respond to the many calls.
My daughter was going to a school a few blocks away from Parker Center (Head LAPD office) when the protests began and the store front windows were broken. Then later that day the LA riots began and many places were burned and people beaten or killed.
I can go on, but it gets wearisome.
How about when I drove up to Canada, ey? On the way up in Oregon, some dodo was weaving on the road, went into road rage...tried to move my car with my family off the road.
Went to a 2 year college in a quiet town...never had much crime in that town until some BG whacked a little old lady who never bothered anyone with a hammer....several times. Put her in a coma for 2 months until she died....she was my next door neighbor.
Take your pick, my friend. Any situation where a gun could have (and did) make a difference in the security of myself or my family? Each time, no shots were fired by the good guys, but the presence of a weapon did make some perps change their minds about doing harm to me and mine.
I live in a good neighborhood too. My house price is nearing $800,000.
Live and prosper, sir.