Thanks for sharing! I live in America and it is, indeed, a hot topic here so it's very interesting to hear views on the topic from around the globe!
You say that "With all this said I do think that in a peaceful society there is no need for private gun ownership". Unfortunately, evil lives among us and we are nowhere near a peaceful society :/ For example, I'm a very short and small girl and if I were ever to move to a big city I would consider getting a concealed carry permit because I don't stand much of a chance against, for instance, a group of big giant guys that want to rob or rape me. Guns are the ultimate equalizer!
Of course, this is just one example out of several in support of civilian ownership of guns. I don't think that the people who follow the law should be punished because of the few who do not follow the law.
Part of me does not like guns because as a 200lb male I won't be pushed around easily if there is no gun pointed to my head, so I can definitely see what you mean by equalizer. However even a hand gun can be grabbed away, if the muggers are bold enough.
I would argue that the best solution to that would be a silent alarm that can be easily triggered (ie as a cellphone app) and a fast responding police. Second best solution would none lethal deterrents like pepper spray.
I also think it is a false narrativ to believe that if guns are outlawed the criminals will have the advantage, because they are the ones using guns. This might depend on the society though, what works for us in Germany might not work over in the States.