Yeah that only works if we didn't see him beat up an ice cream man for her as a child. He genuinely cared about her.
Yes, but this is like Thanos caring for Gamora. Fisk's concept of caring does not equate to how normal humans think of caring for other people. I think this is him caring for her much in the same way you'd care about a thing you own.
Which I think adds to this IMO. He is capable of learning multiple languages, but he did not think it important enough to learn sign for Maya.He learned multiple languages in Daredevil.