And people have gotten a lot tougher. At one time, a .32 S&W revolver was considered quite sufficient for personal defense or even for police use. But today, crooks have hides three times as thick as that on an old bull elephant, so folks have to carry at least a .500 S&W for protection against even a teenage street thug. Amazing, just amazing!!
I figure the difference is that when the .32 was popular, if you tagged a crook in the torso, he might get away from the scene but to die slowly of peritonitis.
Nowadays if you don't nail him DRT, he will get surgery and antibiotics courtesy of the taxpayers.
And in both eras, the criminals were aware of that, and were or were not deterred.