Honestly the ballistics of 380 aren't that different from a 9. Iirc the 9 penetrantes about an inch or so more in ballistic gelatin, so actually hitting what you shooting at is still the order of the day. That Sai a good Defensive pistol course still gives a lot of consideration to what's around and behind your target. Nobody wants to shoot a bystander. Fwiw statistically it's quite rare. Police un the US get in a fair number of gun fights, are lousy shots as a rule, and rarely hit civilians. The number of civilians shot because the bullet penetrates intended target and hits someone behind must be almost zero. It's a concern but in real life seems to rarely happen.
Fwiw If I ever get the chance to leave this country I will. Starting to hate it here. Just the weak ass, sheep-like mindset of people here is starting to be a daily irritant. How I would love to live in a red state.