We'll put, but I disagree with you on this point

The US wasn’t built by public transit though, it was built by car and truck.

Many US towns and cities started as railroad towns, and they grew due to rail connections. They had local streetcars around which new suburbs were built. Downtowns were originally walkable and mixed use. Only later were they destroyed to make way for urban freeways and parking, and the post war housing boom's racist policies brought about single family zoning and car dependant suburbs.