Nah, I wouldn't go technical on you. Maybe on a dim person, not you.
The way I see it, "need" speaks of something's value, so while it would always be "possible", it just needn't be the automatic go-to any time somebody steps on your foot or cuts you off at the traffic merge. We don't
"need" to blow that person away. Just as we don't "need" a fountain pen to write or an 8-track tape to listen to music. You can still
do it (it's possible) but it just doesn't have the value. It would be a rarity. The decline in smoking might be a good parallel here -- still possible but more and more uncool.
To me making gun slaughter a rarity without trying to force the situation is ideal. Voluntary rather than involuntary is always waaaaay more effective. If we as a collective didn't have a continuously-fed "need" to gun people down, gun slaughter would be as rare as axe murders. Axe murder will always be
possible, but since we don't live in an axe culture where axes are used in every TV cop show and most movies and video games, it just doesn't have the... what is the word....
cachet.