I answered your question. Yes, there were some in the army that cared about abolition before Jan 1 1863. Not many, mind you, but a few did.
As you have pointed out so many time, the reason why, doesn’t matter.
Those people were free to support abolition for whatever reason they chose.
I think you accurately understand the percentages of opinions of the rank and file. I am still pointing out I was always referring to the movers and shakers, not the order followers. The top of the chain of command didn't care about abolishing slavery when they initiated their military engagements.
As you have pointed out so many time, the reason why, doesnt matter. Those people were free to support abolition for whatever reason they chose.
Self Interest is self interest masquerading as altruism.
If they were against slavery for their own benefit, then it's really self interest, not opposition to slavery. These sort would defend it if they were making a buck off of it, sames as the Southerners were doing.
Caring about slavery is not caring about your own self interest.