In the same interview--in fact, in the same paragraph--Azzarello says "And the sentence or two [i.e., "she's the daughter of Zeus"] is not for people who read comics; it’s for people outside of comics, in general popular culture." So I think he meant the one-sentence description as a teaser, or bait, to draw people to the book and to the character--not as a final interpretation that readers should take away when they have actually read the book and gotten to know the character. If the bait draws certain people in and thus gets them to read a story about an empowered woman whom they might not otherwise have been interested in reading about, I'm OK with that.
If you want a more nuanced "defining statement" that more fully sums up Azzarello's take on the character as it had developed over his three-year run, see his last issue, in which she explicitly says she is not defined by her parentage, and in which she defines herself instead by her ideals of mercy, love and "submission" ("faith in the strength of another.")
Symbolically or mythopoiecally , of course, it's Darth Vader; Vader is the symbolic parent with whom the questing hero must atone (or, in this case, the father who must atone with his son.) Morally and emotionally, though, Obi-Wan is the "parent figure" who guides Luke into his journey, and the one in whose footsteps Luke most directly follows.Luke Skywalker was raised by Owen and Baru Lars. He didn't meet his father until he was an adult.
In the context of the Star Wars narrative - the hero's journey, as we call it - who is Luke's most important parental figure? What does the story tell you about who has the most influence on his life?
Hippolyta, it seems to me, is a bit of both the mythopoeic parent ("Vader") and the real parent ("Obi-Wan"). Zeus is the former, but in a very remote way--especially since we never get a face-to-face reconciliation between Zeus and Diana. He is monumentally important as the behind-the-scenes force, but much less important to Diana as an actual person in a familial relationship.
No, we never do--nor (as far as i remember) do we hear Luke credit his aunt with teaching him to become the strong person he is. Not only is there little interesting drama in their relationship, but Luke, as far as I can tell, doesn't emphasize her importance as a "parent," so we don't either. On the other hand, he does see Obi-Wan as a key influence in his life--and that is certainly how Diana sees Hippolyta. We hear Diana acknowledging that Hippolyta taught her to be strong and independent, and then, in the subsequent and parallel scene, we see her demonstrating the importance of Hippolyta's influence by teaching the same lessons to Hera. And we see Diana reconciling with Hippolyta--all too briefly, but still reconciling--in the second to last issue, as we see Luke and Vader reconciling at the end of the first-released trilogy. Moreover, if Leia had become some kind of monstrous servant of the dark side because she lacked a good parent figure, then we might give a bit more credit to Luke's aunt and uncle for saving him from that dire fate--just as the contrast between Diana and the First Born prompts us (well, me, at least) to give some credit to Hippolyta.we never even get to hear Baru say, "Luke, I am your aunt!"
I will admit that I would have liked it if Azzarello strongly hinted that Zeus' plan was motivated by his learning the value of loving submission from Hippolyta. This, to me, is the explanation that would make the most sense, but I acknowledge that there isn't a lot of strong textual evidence for it. I've always liked that Azz left us to draw out own conclusions, but very occasionally, giving us a little more basis on which to build those conclusions would have been welcome.
(I'm only talking about Azzarello's run, by the way. I'm not interested in defending anything the Finches have done.)