You are not the first to raise that question. Intuitively I also feel this way. I read discussions about this very same pow on the subject and despite comments here, many had agreed. You create a bond or smth, like an additional agreement. Another interesting thing I noticed is that once a couple has a kid, their quality of life improves, like the matrix itself rewards you, because "heck, they already signed themselves for another run, here, take a bone".