Your example is poor. Housing may lead to a higher local population, but no one copulates based on the national availability of housing.
Anyway no ones mentioned induced demand, which is the relevant term
Anyway no ones mentioned induced demand, which is the relevant term
The GP's point is nonsense, but people most definitely do start families based on the overall cost of having kids, and housing plays a major role.
That's the real reason you build more and wider roads. But it's for some reason sold as a way to reduce traffic.
Even if it happens your way... Is it wrong that an interesting location opens up at the end of new road? E.g. a restaurant or trailhead? Yes, it would increase traffic. But on the other hand, this would also let people do things.