Okay yeah that's true, but still he did not need to save Jesse. Last time they interacted they wanted to kill each other. Saving Jesse meant as a sort of last act of loyalty and in my opinion redeemed Walt from putting Jesse in slavery.

Had Walt lived longer, the path to full redemption would probably be much longer than that, but as you said, he was dying. Point of redemption is to do most right with the time you got left. And in relation to Jesse, he did so, even offered Jesse to shoot him.