I think "gun culture" is something from the media that isn't really as prevalent in the way you see on TV. There are basically three or four mixed cultures regarding guns in the US:
A) Rural / Hunter / Recreational culture. Guns are tools, I like to hunt, shoot targets, etc.
B) "Criminal" gun culture - gangs, drugs, etc. where people use guns to actively threaten people. I also include in here the "I'm afraid of criminals so I'm going to carry too." This is a mostly urban culture.
C) Resist the Government culture - keep guns in case the government tries to use oppressive force. This is the main intent of the Second Amendment, by the way, if you read the federalist papers and other supporting information. Note that even back then, they knew the debates this would prompt, including "but there's no way a state militia could defeat a federal military." The point is deterrent, as in "The feds will count the cost of oppression, instead of just saying oh hey here's this area we can just go and occupy." Compare to all of history where an armed group meets a defenseless group versus one that may be defeated but only after a long battle.
D) All Guns are Bad culture - "if we just outlawed guns, we'd be crime free". The cost of this would be high though, see C above.
The media is hyper-focused on gun violence, because it gets them advertising eyeballs, so selection bias makes it seem like we have constant gun crime. We do have a lot of gun violence and it would be great if we could reduce it. But I'm in the camp that says you reduce it through education and cultural change, not by taking away legitimate tools. Sadly, cultural change is a lot harder to implement (and takes longer) than "ban all the things!"