Q. Why God didn’t create Eve along with Adam?
In the ancient world, animals were the original “high-tech devices” that enhanced and expanded human capabilities. The Bible actually speaks about this in many places:
“Where there are no oxen, the manger is empty, but from the strength of an ox come abundant harvests.” In other words, keeping an ox to plow the fields is well worth it because of the far greater harvests this makes possible.
“If you have raced with men on foot and they have worn you out, how can you compete with horses?” Even though this is spoken to Jeremiah as a metaphor, it’s drawn from the ancient experience of relying on horses for much greater than human speed in communication and warfare.
“Be sure you know the condition of your flocks, give careful attention to your herds … the lambs will provide you with clothing, and the goats with the price of a field. You will have plenty of goats’ milk to feed your family and to nourish your female servants.” Here again the benefits of relying on animals, in this case for food, clothing, and wealth, are highlighted.
Because animals expanded human capabilities so greatly, in the ancient world they were even worshiped as manifestations of divine power. The bull, for example, became a symbol of Baal, a fertility god.
But to speak to your question directly, and to address it from within the story of Adam and Eve in Genesis, I think God first brought all of the different animals to Adam “to see what he would name them“—which implies that he would recognize their various qualities—so that it would become apparent that despite all the advantages the animals could confer, nevertheless “no suitable helper was found” for him. Adam was supposed to say, “I still need something more.” And then, when Eve was presented to him, he would exclaim,
“This is now bone of my bones
and flesh of my flesh;
she shall be called ‘woman (‘ishshah),’
for she was taken out of man (‘ish).”
In other words, “At last, someone like me, who’s just right for me!” Significantly, Adam gives himself a new name, ‘ish, when he recognizes the woman as ‘ishshah. He understands himself in a new way by understanding what kind of creature is his complement.
So because animals were so highly valued in the ancient world for the way they could expand human capabilities, I think it was strategic for God to show Adam all they could contribute and still have him conclude, “I need something more.” This would enable Adam to recognize the cooperation and interdependence by which he and Eve would most effectively fulfill their responsibilities as God’s representatives within creation and build a joyful and fruitful life together.