That's a nice sentiment but I don't think the world is so kind as to permit it as a matter of general principle.
The reality of the situation is that there are forces out there that will gladly commit any amount of evil if they believe it will benefit them. Against such forces, there are two options: resist, or fall. To resist means to summon enough force to fight back. To fall means to lose everything we stand for and become part of the very evil we oppose.
Look, nobody likes the idea of conscription. It goes against everything we believe in a free society: that people should be free to choose how they live. It's an awful practice and easily abused, but at times it's also absolutely necessary.
In the US, we can get by without conscription at the moment because we're one of the dominant forces in the world. Our military might is more than sufficient even without conscription, the other major world powers are content to get along with us or fight us indirectly, and the foes we do fight are unable to come anywhere close to matching our martial power. Our geographic location has also helped isolate us to a degree, which helps us avoid conflicts we don't want to involve ourselves in. Conscription isn't necessary given the circumstances, and so we don't (and shouldn't) make use of it.
I want to emphasize this, though: this is an abnormal situation. It only really applies to a small handful of countries, all of whom had to make heavy use of conscription in the past to get where they are today. Most other countries aren't nearly so lucky and face the threat of invasion on a much more frequent basis. And more importantly, this position we find ourselves in won't last forever. Many people seem to think that we're somehow different than every other empire that has come before us, that we'll never have to worry about losing our place as a world superpower.
These people are delusional. All of the world superpowers currently in existence are relatively recent. Britain is probably the oldest unbroken major power still in existence, but it is no longer the world superpower it once was. So setting those aside, every empire that has ever existed has fallen. This includes empires which, at their peak, were far more prosperous and vast than any of the existing world superpowers is or ever was. Some of these empires lasted for millennia, spanned most of the known world at the time, and generated cultural and technological works that survive through to this day. But in the end, they all fell.
When our daily lives are so far removed from the conflict that goes on in the rest of the world, it's natural for us to grow complacent about these kinds of things. It seems far off and unlikely to ever affect our lives, so it's easy to talk about it and think about it as though it's not our problem. And this mentality is one of the greatest dangers that can befall a major power, because when an actual threat does present itself, the people will be dismissive of it and reluctant to commit themselves to fighting it. This only serves to further empower the threat.
I believe we should always be reluctant to enact conscription. It's good that it makes us uncomfortable because it's a terrible practice that runs afoul of our most fundamental beliefs. It's also easily abused if not opposed; look at the Vietnam War, for example. But it's also something that we must be prepared to use when necessary, because there are times when we must fight if we wish to preserve our way of life for future generations.