I always go back to chess when I have these kinds of doubts. Deep down, we like human creativity and that's what made AlphaZero's chess entertaining for us as well as it wasn't as unnatural as traditional chess engines. But, we still enjoy playing and watching chess. Many new approaches have been discovered using powerful engines which probably would not have been tried out without them. The same thing can happen with math problems. We may have fresh takes on problems previously considered unsolvable, etc.