Guns are an equalizer, other portable weapons greatly favor the thug.
I hear a lot about guns being an equaliser. They are, but not in terms of the imbalance between criminals and their victims; They equalise the effectiveness of force between a big, strong, athletic person and a small, weak, unhealthy one.
The reason that the illogical jump is then made from "favours the weakling" to "favours the victim" is that many people have an image of criminals - particularly violent criminals - as big tough men who are easily able to overpower an unarmed victim.
This image may be true, in a world without the equalising effect of guns. Weaklings who attempted to become muggers would just end up bleeding in the gutter.
But the very equaliser that gun advocates claim will protect victims, also promotes weaklings to effective criminals.
The equalising effect of guns on violent crime is only real if we live in a world where criminality is a function of physical strength. We do not live in such a world.
For every weakling who gets mugged by a strong man, and thinks that if only he had been armed, things would have been different, there's a weakling who wouldn't have become a criminal, if not for the ability of his guns to prevent strong victims from effectively defending themselves.
Guns equalise the impact of initiating violence, but they don't equalise the power disparity between criminals and victims, because neither group had a prior tendency to be physically stronger (or weaker) than the other.
A gun enables a weakling to defeat a stronger person. But we have no reason to assume that the weakling is the victim, and not the criminal.