That was the point. Perhaps it's time you did. At least the law abiding component; you can rest assured that if the villains really wanted firearms, they certainly can get access.
Like others have said; entirely different culture.
The U.S. system is beyond flawed. People buy guns because criminals have guns... they fail to secure said firearms like responsible gun owners, tens of thousand get stolen every year and go where? Oh that's right... the hands of criminals that perpetuate the need for non-criminal gun owners to own their gun... It's self-perpetuating idiocy at its finest.
I am with you on the front of disproportionate response, but that's just me. I live by the philosophy that if anyone crosses me in extremes like that then they're going to live their life with someone that reminds them of that transgression. However the fact "some wouldn't walk away" is just dangerous talk... Even if I had a gun I wouldn't be prepared to chance my life for a few items. If anything I'd only place myself at greater risk by drawing my weapon and that much is evidenced in studies in the U.S. that show if you're armed in a home invasion scenario you're more likely to get shot/killed yourself.
This guy did the right thing and the U.S. is all the proof we need that unnecessary rights for law-abiding citizens isn't justifiable when we look at the negative side of that equation. Gun ownership is not justified in the U.S. under the current framework(which is absolutely insane and entirely disregards the philosophy of great responsibility accompanying great power) given how many issues it causes.
But yeah, different culture. Pretty sure German police officers fired less rounds in one of the previous years, that is all of them combined, than some officers have discharged against unarmed citizens in the U.S. in single incidents.
We don't want nor need that 'right' here. I'd rather be scoffed at than have the privilege to expedite my meeting with my Maker.