You are interpreting the phrase specifically in a way as to make it a tautology, rather than responding to the "strongest plausible interpretation" as required by the site guidelines.
Currently both anti-social and pro-social individuals possess firearms. If possession of firearms is criminalized, those who tend toward pro-sociality will give them up disproportionately. Such a policy would therefore tilt the balance of power toward those with anti-social inclinations. This is a bad outcome.
I didn't mean to express that the outcome was good or bad.
And I don't take a position on whether the authorities are grouped with the "anti-social" crowd. Some people would say they are.
Purely for the sake of discussion, I presumed the conceit that there is a "justice system" which is "pro-social".
In that context, it seems clear to me that criminalizing things is a very useful tool.
If you reject the premise, you might be perfectly correct, yet I would still expect people to be addressing those who believe there is a "justice system".
Surely all sensible anarchists can imagine believing in "law and order", and assume that a random person probably does?
Even if one doesn't believe there is a justice system, one might believe there could be. I automatically assume anyone who wants to discuss topics like crime and justice believes in the concepts.
The judgement "obtuse" comes with the sense I have that the context is otherwise violated.
Currently both anti-social and pro-social individuals possess firearms. If possession of firearms is criminalized, those who tend toward pro-sociality will give them up disproportionately. Such a policy would therefore tilt the balance of power toward those with anti-social inclinations. This is a bad outcome.