We have had cats for 20 years - me and DH/our family...
We have always lived in a safe area - cul-de-sac/no main road etc. We have never had any cat harmed (touch wood!) We have had 3. One died of natural causes 2 years ago aged 18, and the other two (15 and 13) are still alive and kicking. They are all female, and have never wandered more than 50 yards from our property. I think male cats are more likely to get killed because they wander off more. (Not the owner's fault at all.)
Ours have always been outside, but a few years ago I had penpals and I told one (from Northern California) that we let our cats outside. She slagged me off something rotten. She said I was putting my cats in danger and peril, and if I loved them and cared about them I would keep them in.
She lived near a freeway (only 200 yards from her garden,) and also there were wild dogs and big wild cougars around her area (in the hills,) so yeah it WAS a bit dangerous for her cats. But not in a cul-de-sac, 10 minutes walk from a main road in bloody Milton Keynes!
My aunt and uncle lived on a through-road (not busy though,) and had a female cat called Penny, who lived to 24! And she was allowed out.
Ours are allowed out, and have always been fine. I think cats SHOULD be allowed out, unless you live somewhere that has the M5 at the bottom of your garden (Then again, you probably shouldn't have a cat unless you live more than 6 to 7 minutes walk from a road with a fairly high volume of speedy traffic!)
Oh yeah @ArizonaRobbins YANBU!
(btw, I stopped writing to my Northern Californian penpal after she said I was being cruel to my cats!)