Many armies around the world exist to enforce the will of the government, not the governed. Why do many African nations come to mind when I say that? It's a drawback to have a conscripted army when you want to crush the rebellion!
The key word is most. Don't forget that to some Democrats, the path to power lies in having served in the military honorably. Joe Biden's kid is in, so is Sarah Palin's.
Professional armies are composed of people who wanted to be there, not had to be there. But it's hard to say what would happen should we do that here, as it's against the posse commitatus act. US cannot have armed forces inside the border, kind of thing. The why we don't have the army along the US/Mexican border, even with a GOP president. It's why the French Foreign Legion is good, and the French army is known as a bunch of surrender monkeys.
Humans being humane, what a concept! Nothing like Rwanda, eh?