By continuing to make Selective Service registration and draft eligibility apply only to men, the Coalition for Men is arguing that the system is violating Constitutional rights of men by sex discrimination.
They are certainly correct but there is a much simpler argument that does not carry the baggage of sex discrimination.
That argument is simply that the draft is slavery and we abolished slavery in the 1800s.
This concept is further embodied in the Libertarian notion of self-ownership, that we own our bodies, and no one has a greater right to control them.
My thanks to the retired NSA director and the nine general and flag officers who are supporting the idea of ending the draft, but I wish they had made their arguments based on individual rights rather than sex discrimination.