More to the point, given that we have doctors and fire departments, why should anyone need a first-aid kit or a fire extinguisher? Likewise, since we have police departments, why should anyone need a gun? [note: the answers are analagous]
I'm told that it is an extreamly rare situation for anyone to ever have to defend themselves in such a manner. Better chance of winning lotto or struck by lightning yada yada.
Well , I play the lotto and ninja beer bunny golf ( with little sucess I may add, darn it) "BUT" have "indeed" encountered the need to use self defense for me and mine and hope to the good lord that I never , ever, ever have to do it again. But at least I'm alive and well and owe it to just having the simple 1911A1 stuffed in my waistband under a baggy shirt.
My Girl Friday aka soft squeezy toy seems to think I wear it , a spare mag and a surefire flashlight just to keep my love handles from spilling over my belt :o)..........I gotta PT more I guess......
Stay Safe