Why is there ignorance in the first place? You're asking for a cause of ignorance. The moment you ask why, you've already accepted causation. When you ask why about ignorance in maya, in the world of maya, you can ask why for everything. But for maya itself, you can't ask why. Nobody who's attained enlightenmenth s like a advanced spiritual seeker or a ensaint enlightened being in any religion will be able to answer that question. On this side of enlightenment, enlightened ones, they have the answer, but they don't have a question.