There is another aspect to this question that is seldom addressed;
The Confederacy granted the states as much power, and in some issues, more power than the central government.
Lincoln had a Union, with more power to carryout the business of war and trade and administration than did Davis.
As an example, even while the war raged on, the Union was building the Transcontinental Railroad, carrying out another war against the Indians on northern plains, Davis on the other hand, proposed a simple additional railroad connection be built from Raleigh NC to Richmond Virginia early in the war to allow for better movement of troops and goods, and was roundly criticized by the southern press and most state legislatures for wanting to use other states taxes to build rail systems for the benefit of Virginia's defense.
Davis was as much a herder of cats as he was a president of a nation. This has a lot to do with the ability of the Union to attack the individual states thus requiring a local response tying down state militias and forcing deployments of CSA forces.
By doing this the strategies available to Davis or Lee were restricted, granted they did carryout short thrusts into Maryland and Pennsylvania, all those efforts were restricted in scope and deployments would be limited in duration.