I think when you have no help it can be hard but I do think that people have to do what they are comfortable with. My father never took care of my hair at all but I love my natural hair. Similar to your husband, he did do his role in telling us we were beautiful just as we were and I see how important that was now.
My husband really does not care for hair care either. He will help me with creating parts at the back of my head because it is hard to see but that is pretty much it. He also once helped me curl a bride's hair/weave (her hairdresser failed to turn up, so guests to the rescue!), and he was good at it but I know that it was not his favourite thing to do.
I think as your girls grow the take home message should be that they should care for their own hair. Pass your skills to them so they can be self sufficient as they get to 9-10 years old. He sounds like a pretty nice husband to me.
What do you think? What is the role of the father as far as natural hair is concerned?