Exactly my point. That means it hd no real effect. IOW, even if Lincoln had the authority, he only applied the proclamation to areas his government didn't control (i.e., areas still under Confederate control.) A piurely symbolic gesture, nothing more.
Which goes back to his letter to Greeley.
I suppose you would have to calculate how many people were held in bondage on January 1, 1863 and how many were held in bondage on December 5, 1865. If those two numbers were about the same then I'd agree that it was purely a symbolic gesture. But if considerably fewer people were held in bondage in December 1865 as opposed to January 1863 then I submit that it was a pretty effective war measure where freeing slaves was concerned.