Transportation being 15% is a direct issue of people wanting to have kids in car centric suburbs and "master plan communities".
The US suburb life will get more and more expensive as our planet keeps consuming resources and climate change intensifies. My friends who are parents refuse to have kids share a room even though they might spend $50-$100k for a bigger house. The cost is unfortunately partly self-inflicted with what US culture deems successful and the norms.
I can't put the blame on the parents but they don't help themselves
this is a weird take. society aint really set parents up for anything else. most places it costs more to live in cities/city centers while getting less space (buying in oakland - $920k, 30 miles east in antioch - $640k), little to no outdoor space, questionable safety, bad schools and other issues that come with big cities (tho plenty of suburbs are shyt too). and in the case of places like LA, ATL, Detroit, and many parts of the Bay Area, you're also not getting efficient, well connected public transit.
Our cities weren't planned around sustaining the amount of growth they've seen in the last 60 years, yet suburbs were planned with growth and family friendliness in mind. i'm not an advocate for sprawl, but it's kinda comical to blame parents when the planning that took place post WWII in the 50's-80's is what fukked cities and their livability for families.