This is like going along with the crowd in China when they started killing off all their young girls leading to this current population imbalance. The right solution is to go where no one else is at the moment and have large families.
No one is stopping couples from having big families (except their economics perhaps), but no one should help them either. There are 8 billion people on Earth, headed to 10 billion. We are currently unwilling to spend what it takes and reconfigure socioeconomic systems to provide quality of life for the humans here now. Fix this and then an argument to have more kids is potentially palatable. But "spit more expensive [time and fiat] kids into the torment nexus?" Neither a rational nor empathetic argument imho.
