For me the issue is easy to conceptualize. Some people just like guns, some people, use guns regularly, some people at least arguably need guns as tools, some more arguably, some less arguably, and some people really want access to guns for various utilitarian reasons, convenience, peace of mind, etc.
Obviously, a human being only needs food, water, and shelter... clothing, maybe, depending on climate (and love/companionship... but that's a separate issue)... so the rest are arguably just wants. But "wants" can be pretty compelling, based on the stuff I mention above and more. So I take something I really like, and put it in place of guns, and imagine what it would be like if the government just banned it outright.
For me that's football. I really like football (Murican). I coach football and have a kid who absolutely loves football, which is admittedly, a near euphoric experience unto itself... having a child who loves what you love, and gets to experience it all with new eyes... In any case, football is near and dear to my heart. If the government wanted to ban football, I would be motivated to vote against that.
A difference, is that the right to play football is not a Constitutionally enshrined right, but if it was, and had been for centuries, I'd probably be pretty self-righteously opinionated about the regulation of football... cause I like it.
Guns... for lots of folks... is their hobby... But its a Constitutionally protected hobby. So I get... and am less enthusiastic about opposing, their Constitutionally protected right, to their hobby... and again, that's putting aside people who actually use guns as tools in their livelihood.