The comparison is between today and ‘today but without the highway’, not between today and before the highway was built. If the population increase is greater with the highway there, that’s still part of the induced demand.
I wouldn’t suggest that highways never induce demand, but the idea that people are driving more in Boston because of the Big Dig seems doubtful to me.
A city being “bad for drivers” is not a great indicator of it not being car dependant. Cities in the Netherlands are probably the most walkable and bikable on the planet, and also great to drive in because there are hardly any cars.
The Netherland has pretty robust car infrastructure too.
And I agree; a city can be bikable, walkable, and drivable all at once. That should be the goal.