Given just how litigious the yanks are, gun ownership can be a surprisingly simple matter. But if a legally armed citizen actually has to draw his or her weapon, let alone use it, you can bet that a lawsuit will almost certainly result.
Before being issued with a concealed carry permit, most states insist that you complete and pass a course, during which, amongst other things, it's impressed upon potential permit holders that drawing their weapon in public without lawful excuse and proper control is going to get them either bankrupted, imprisoned, shot or worse. It's not the sort of thing that anyone takes lightly.
I'm as frightened of untrained people waving unlicensed guns around as the next cyclist. But you still haven't persuaded me that legal and responsible gun ownership isn't a Good Thing.
And bear in mind, I'm talking gun ownership expressly for the purpose of self defense here - something that's not been allowed in Great Britain since WWII. Any argument to deny responsible sporting gun ownership is even dafter IMHO.