Some of those who take their comics seriously and think deep thoughts about them have remarked on the symbiotic relationship between super-heroes and super-villains. They do seem to form yet another Yin-Yang pair (and, as I’ve mentioned many times, we find such pairs many places in life). In fact, many see comics as nothing less than variations on the basic Yin-Yang of good and evil.
There are even those who suggest super-heroes create super-nemeses as necessary mirrors and justification for their existence. There is just enough truth to that to make it seem debatable, but the more common view is that both arise as natural symbols of basic good and evil.