The above in bold is an assertion, not an argument, it seems to me. What New York thought is of some slight interest, but hardly dispositive, and certainly not controlling.
"The current Militia Act, enacted in 1956 and derived from the original 1792 Militia Act, defines the "militia" as including all able-bodied male citizens from 17 to 45; 5 given the Court's sex equality jurisprudence, I feel comfortable saying that every able-bodied citizen from age 17 to 45, male or female, is a member of the militia. This is quite consistent with the second clause's securing an individual right to every person."