We don't want to reverse the causes of declining birth rates.

    1) Car culture (and trespassing culture) eradicated free roaming
     areas for kids. This resulted in
    2) parenting time is 20x higher than a few generations ago
     because
    3) children live in adult-curated boxes, under 24/7 adulting 
     because
    4) they have no where to go. See 1.

In the US, a depopulated civilization would be allowed before we abandoned ~mandated driving.