For your analogy: yes, guns should be banned. That bottle has been opened in most places in the world, and some countries have actually put the genie back in, and it has resulted in dramatically lower gun death rates. The UK for example, as it has one of the lowest gun homicide death rates in the world: https://en.wikipedia.org/wiki/Firearms_regulation_in_the_Uni...

Moreover, yes, other deeply awful weapons are also banned. Biological weapons and Chemical weapons are both widely banned by all decent countries in the world. Nuclear weapons should join this list. They almost did, during the Reagan era: https://www.theatlantic.com/politics/archive/2016/01/ronald-...