You need to learn how to figure out their motives.
The Dem in charge of my county during the peak development years that he supported fully said the same thing, that building roads just encourages more development, all while he supported tens of thousands of new houses being built here..
That argument makes no sense, it's like saying the cart pulls the horse.
The reason why these libs encourage massive development without the required road work is to build voters support for public transportation at taxpayer expense, the LAST THING I WANT HERE.
The motive behind "development" is not the same as that behind roads.