There was a good chance it would end that way but the south had no choice because they were an AGRICULTURAL ECONOMY and the north was an INDUSTRIAL ECONOMY in expansion.
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The Agricultural economy of the south depended on the slave labor. Slaves were the wealth of the south, the property, more so than the lands or buildings of the southern citizens.Consider that there were almost as many slaves in many states as there were whites. Consider that in the north, slave holding blacks as well as whites were immune from the threat of loss.
Those facts alone help explain why the Deep South was so eager to secede completely, the Upper South less eager and never completely, and the Border South refused to formally secede, sending more troops to the Union than Confederacy.
As for the effects of Lincoln's 1862 Emancipation Proclamation, at the time it originally effected only about 50,000 slaves, but by war's end, in 1865, around three million were freed by the Union Army.
By the year-end of 1865 the 13th Amendment freed all remaining slaves, North and South.
So, while clearly you think you have an important argument here, once understood, your claims make no sense.