Your third point hits the nail on the head imho, but this:
> Hollow point handgun rounds drastically reduce the danger of over-penetration present with rifle rounds for likely police scenarios.
Isn't really true anymore. There are modern cartridges for 5.56 that have great ballistics while in the air, and then very reliably dump all their energy into the first thing they hit, to the point where if you shoot drywall they will make a huge hole in it but not significantly harm a person standing a few meters behind it. If you are concerned about overpenetration, today it should guide your selection of ammo, not your weapon.
> Hollow point handgun rounds drastically reduce the danger of over-penetration present with rifle rounds for likely police scenarios.
Isn't really true anymore. There are modern cartridges for 5.56 that have great ballistics while in the air, and then very reliably dump all their energy into the first thing they hit, to the point where if you shoot drywall they will make a huge hole in it but not significantly harm a person standing a few meters behind it. If you are concerned about overpenetration, today it should guide your selection of ammo, not your weapon.