First of all there would be much less people dying of weapon accidents. Also probably the firearm industry will go bankrupt and that won’t happen so fast since their lobby is one of the strongest lobbies in the country. But beside the need to go against the government and to feel so called free what does the firearms give to the citizens? Thing is that the US is a real disturbed country, so many weirdos and psychological sick people. That’s why it is a problematic country to grow kids in. In a state with so many people starving for basic things no wonder that people have the feeling that it’s a predators kingdom in which the strongest survive. In this psychological state people feel they must protect their own and for that they must have a gun or two.
Would you buy a gun if you lived in the US? This is not a simple questions, especially if you have small kids in the house. But also if you have a pool in your house it can be dangerous for small kids or knives… so you understand why it is not a yes or no question exactly. Many people try to make it into a black and white things but its not that easy. Also not everyone buy and hold guns for self defense, some do it for hunting or for shooting as a hobby. Again who is to say that it is a worse hobby than fishing or cooking? And still it is very clear that in the US the access to guns makes it just too easy and it costs in many precious lives compared to other countries in which people can’t just hold guns for personal use without permission.