(Correct me if I'm wrong), but what it sounds like you're saying, is that I should have kids of my own and strive to make their lives better? Or something similar to that? Well if that's the case, I really don't have a "moral obligation" to do that, especially not when it comes to having kids of my own, because they (the kids) don't need to exist in the first place.
"Imagination, life is your creation"