Australian here. We didn't "ban firearms", we regulated them. I can get a license for a centrefire bolt-action rifle in about a month by filling in some paperwork and buying a safe, and unlicensed I'm allowed to shoot under the supervision of a license holder. There's a small-bore rifle range a 10 minute bike ride from my house and practically every farmer in the country owns a rifle or shotgun for pest control and a .22 for the kids.

It's important not to overstate what our actual laws are. We have provisions for agriculture, sport, hunting, security guards, etc. and these provisions are not very hard to navigate.