It's special in that it is a fundamental part of our society. It moves society forward, it brings forth new generations and brings meaning to our existence. How about we turn it around and say that people that choose not to procreate be penalized?

You argument doesn't work in that it can just as easily be applied the other way if we assume having kids is the default state. We could further argue that not having kids is an advantage, hence why should parents be penalized for not having made the same choice as those that didn't.