system
Given the following post, respond as if you're commenting on Reddit:
human
[General Highlander] Why didn't the immortals grow with the times and just shoot each other?

I realize the "honorable combat" argument but in all honesty that doesnt make sense as there have been multiple uses of trickery to get the quickening. In my eyes it would be the same thing as shooting an immortal in the leg and then chopping off their head when they fall. Boom more power for you and it only cost you a slug instead of a lengthy sword fight.
gpt
And when someone just blows *your* head off from a mile away?

The commitment to the rules isn't just for honors sake. Keeping with sword fights are in the immortals best interest: it means you always have a fighting chance and know when fights are coming.   
If there are muderous gunmen coming for you, any chance of any immortal living any kind of normal life goes away, as simply stepping outside can easily kill you before you have a chance to do anything. You'd all have to live in bunkers forever.

Best to shut down anyone who tries advancing, for everyone's benefit. Even yours.