Human nature is exactly why we need guns in the hands of citizens. In the USA, gun control was something first proposed by organized criminal gangs because they were tired of their guys getting gunned down whenever they tried to commit crimes against citizens.
The problem with gun control laws is that in the end it means the law-abiding citizens give up their guns, but the criminals who don’t follow the laws will get them anyways.
Nearly every single mass-shooting in America has happened in a gun-free zone.
As far as other countries go, that varies. Brazil has the strictest gun control, but has more murder and suicide per person than the USA. Areas like Chicago and Detroit have the most gun control but hundreds of murders per year.
If you want to avoid getting shot in America, then avoid drugs, gangs, domestic violence and drama in your social life. Do those things and the chances go down considerably.
The average response time for the regular police is 23 minutes. Think of how much a desperate, angry person with guns can do against an unarmed population in 23 minutes.