"...Lincoln certainly did intend to free southern slaves when he wrote the Emancipation Proclamation."
Yes - Lincoln's intent was to cause uprisings in the South to undermine the Southern commanders' abilities to fight the war. He cared practically ZERO about the slaves. He made that abundantly clear when he told a delegation of freed slaves in Washington, DC (paraphrasing) "I do not consider you to be my equal, nor will I ever."
Lincoln gained a great deal of his wealth from the toil of slaves. Mary Todd's father used to own slaves.
Ever seen any of THAT written in a history book about "The Great Emancipator"?
Didn't think so...
But Mary Lincoln did not own a slave, nor did Mary Todd Lincoln. I read that somewhere.
Lincoln said and wrote a lot of things about slaves. For example: "If slavery is not wrong, nothing is wrong." To suggest as you have that Lincoln cared practically zero about them simply because he did not view them as equals is not surprising but inaccurate.