I also hate it when people say that a married couple can't have as many children as they choose to have because the world is over populated as it is and they have no business adding to that.
These are usually the same people who want no controls over immigration, and who wouldn't think of saying that to a Hispanic couple, or a black couple, or a Muslim couple.
Everything happens for a reason. That's like saying you're supposed to go through something bad, tragic, or the like.