Did the intelligent beings evolve naturally? If they did, why can't we have done so? If they didn't, who created them, and how did those folks come to be? Did they evolve naturally? And so on, ad infinitum.
Of course this postpones the question of the origin of life. But does that really matter? If the data says that the complexity of life is too great on this planet to explain except by outside intervention, then so be it. I'm a grown up. I can live with that.
The point is this. The intelligent race that "seeded" life on earth had to have come from someplace. Perhaps the place where they came from contains obvious data that explains how life originated there. Perhaps the conditions on that planet are different in such a way that we would look at it and say, "Oh, I didn't think of that. It's so obvious now."