See, I think the draft as a concept is outdated in the 21st century with the advent of proxy wars and insurgent warfare, but if we are going to keep it, might as well have both genders in on it.

The issue is predominately due to the equal rights feminism that is quite rampant, certain rights like the right to vote that women have, don't have the responsibilities associated with them, like registration for the draft. If we start from the equal rights mindset, it HAS to be equal responsibilities too, or you are just promoting one sex over the other.