LE in the USA generally selects ammo that penetrates 12-18 inches in what?
I can get a .32 to penetrate 12-18 inches, but what makes 9/10mm or .357/.40/.45 better is that it will penetrate that amount in some particular and repeatable medium that .32 won't.
Heavy clothed gel.
Penetrate and consistently expand; the consistent expansion is where pocket 32 is going to have trouble.
But I am not a LEO.
I will never be serving a warrant, making an arrest, responding to a domestic violence call. making a traffic stop or chasing a felon.
I will not be protecting property or upholding my honor or keeping face.
If I ever use a handgun in self defense it will be at BBD and only to protect myself or those immediately around me. My priority will be having something small and extremely controllable that allows me to place multiple shots on target in a short period of time even when under stress. I want something with the least possible risk of endangering anything other than the specific and immediate threat. It will be location, Location, LOCATION.
I don't disagree with most of that.
At BBD (bad breath distance) stopping the threat(s) ASAP would be a priority, desirable to have bullets with greater incapacitation potential. (for me)
Lethal but non-cns hits (lungs/heart) will still allow for about 10 seconds of continued voluntary hostile action.
Larger holes in attacker(s) are desirable from the perspective of the defender.
9mm HST, Ranger, Golden Saber expands to .60 or more in heavy clothed gel, that is about 2x the diameter of 32 FMJ.
A better 9mm HP seems like a good minimum for ASAP incapacitation potential and ASAP is desirable regardless of location, anywhere/everywhere.