That statement outside of the timeline context and necessity involved is meaningless.
The Confederacy was fighting a war of survival, the North was fighting a war of subjugation. I give defenders a lot more leeway morally than I do attackers.
The total numbers serving the Union army were around 2.5 million, so there were far fewer conscripts in the North vs. Confederates.
And again, out of context. The North's population was 4 times the size of the South, and that was before they dragooned the Irish off the boats.
This nation drafted men for war, even when our own survival as a nation was not under threat.
Except, of course, it was Confederates who first attacked, and not just at Fort Sumter, but all over Union States & territories -- from New Mexico & Oklahoma to Missouri, Kentucky, West Virginia & Maryland -- for the Civil war's first 12 months more engagements were fought in the Union than in Confederate States, and more Confederate soldiers died in the Union than in "their own country."
So, the war ended in the South, but it started mainly in the Union.
DiogenesLamp: "This nation drafted men for war, even when our own survival as a nation was not under threat."
Our survival as a nation was under greater threat, arguably, than in any war before or since. The tolls of dead & wounded alone should be a clue.