> Lover birth rate is a good thing in the long term
It most definitely is NOT a good thing to have a birth rate below replacement in a developed country, especially one with European-style social programs. Eventually you run out of workers to support the people who aren't doing so.
If you assume a developed country, you have an attractive place to live for many people from other badly developed countries. So you can simply import them.
I think he means there's a difference between births arising from couples in love, as opposed to births arising either by accident or from couples bound by other arrangments forced out of motives of survival, hence the qualifier being a "lover's birth rate."
As for quantifying which births are "lover's" births, and which are not, well... good luck with that.
It most definitely is NOT a good thing to have a birth rate below replacement in a developed country, especially one with European-style social programs. Eventually you run out of workers to support the people who aren't doing so.