The problem, Elwe, stems from fear, I believe.
Folks who think they need to be able to keep weapons for themselves are afraid. They fear the government, authority, even other citizens under the belief that others want what they have and will take it from them if they are not strong enough to defend it.
Unfortunately, that was the thinking of our caveman ancestors. Once laws and police forces were created, most folks have tried to become more civilized and trust in the authorities to take care of the cavemen of modern day. Sure, there are rotten authorities, and there are times when the authorities cannot arrive in time to protect an individual citizen, but overall most people live in peace. Again, it all comes down to being more afraid than faithful.
The main problem on Earth with guns is that they are very easy to obtain. Therefore, the idea that a criminal might have a gun isn't far-fetched, it is almost a guarantee for all but the poorest of criminals. I can actually understand why, on Earth, someone would wish to be armed in order to protect themselves. There are too few authorities for too many people, and the authorities cannot protect everyone. On Earth, people should be a bit afraid of being shot, especially if they live in a place where most people have guns.
In Asgardia, however, the situation will be very different. There won't be a bunch of firearms to be easily obtained. Guns are heavy, bullets are too (in quantity), so regular firearms would be largely wasted space to even take INTO space. Someone may be able to fashion a makeshift firearm, but even that would be limited to one, perhaps two shots before it would require a reloading, and wouldn't carry near the lethality of today's firearms, especially as medical facilities should be within a few hundred meters on a space station. There would simply be far less reason to be afraid.
Every argument I have seen in the defense of personally carrying firearms has boiled down to fear. In my experience, every decision based on fear has ultimately been proved to have been a bad choice, or the worst choice of all possible choices. Thus, I do not think that laws or rules should be written based on fears, but instead of realistic hope. Yes, people will do bad things, if they are put into a position where the bad thing seems to be the best choice. If people are given better options, with fewer penalties and punishment, only the insane, or terrified would still pick the bad option.