I'm afraid I can accept no compromises here. Forced military conscription is legalized slavery that has its basis in the worst kind of uncivilized thinking, the thinking that young men exist only to be sacrificed in service of others, and that their highest purpose is to submit to a sense of "duty" that disregards their freedom, health, safety, comfort and lives as unimportant. The practice, and the thinking/ideologies that drive it, have been responsible for the appalling suffering, trauma, injury and death of millions of my brothers and sons over the course of our history. More than that, the ideology that there is glory, honour and dignity in military service, combined with an understanding of the disposibility and expendable nature of young adult males (which is rooted in biology) has led to continual warfare among humans for millennia. We must overcome these primitive means of relating to ourselves and our young males in particular. A society that views its young men first and foremost as a resource for war will find a way to wage that war, to the ruination of itself and its neighbours. You should be viewing your brothers and sons as your fellow sapients in need of care, not as a barrier between you and harm. You- we- are all in it together. Throwing your sons- or anyone- in frount of you as a shield is a mode of behaviour no nation can now afford.
On the personal level, seeing as I am among those who, if I lived in such a nation, would be drafted: why would I wish to fight for a society which viewed me as a slave, or viewed my son as a slave? The future of my people and society, and my purpose in life, lies with my future children. Why would I fight for a country that sees my son not as anything precious or important but rather as cannon fodder? Once you break out of the thinking imposed upon our race for millennia- the lie that there is some inherent dignity in being a warrior, a lie designed to justify and legitimate the social role of young men as soldiers- then there is no logic to a draft. It merely damages the cohesion of your society.
True strength comes from unity, from alliance, from caring for and loving and aiding others. Not from imposing on a certain group of people and saying "You. Go and fight for me. It is your duty".
I would, if it were necessary, fight to defend a free society that would guarantee my children's protection throughout life, and recognized my own sacred right to life and worth. It would cause me incredible psychological/spiritual damage to have to be engaged in violence or acts engineered in the name of violence, but if my free society were facing invasion, it must be done. Not because it's dignified, or "my duty" but because I assign value to a society that assigns value to me, and I will act to preserve it. However, I would never fight for any society that would force me to do so. That society does not assign value to me, thus I see no reason to asign value to it. I decide when I pick up a weapon. I decide what is and is not worth me fighting and sacrificing for. I put a value on my life and safety in relation to other concerns. Not a government, not some "traditional" ideology or shared consciousness imposed through centuries of nationalistic propaganda.
As a young man, and almost certain to be drafted if a draft were initiated in my country, I can only say this to those who would support such a thing: My life is precious. I am not a thing put on this Earth to serve you or (if "you" are yourself a young man) to have your self-concept applied to me. You have no business trying to tell me what I should be willing to sacrifice and suffer for your benefit.
It upsets me greatly how many people still refuse to grasp this.