Because clearly, since we're not having sex, we must be doing something else. So, how are you utilizing your extra free time to push ahead of the (non-asexual) pack?
In my own case, I plan to learn guitar, become a famous soloist, get rich, buy an island, turn it into a superpower, and take over the world. And then ban sex. All reproduction will be through in-vitro fertilization, and you'll have to pass a stupidity test beforehand. You could basically say, then, that my asexuality is the single solution to all the world's problems. You're welcome
And remember, sex leads to violence (but nudity is okay)!