NO it's not the only thing we can do.  Instead of focusing on long range commuters, the focus should be more local.  Leave light rail and express buses for people to commute downtown and to the tech center.

Focus on biking, bus, walking and metro shuttles for getting around downtown.  It's too wasteful for each suburban commuter to drive themselves in their own car alone to work.  You also have to build the alternative infrastructure first to get people to use it.  It's like field of dreams, if you build it they will come.

Development and planing should also focus on using existing light rail infrastructure.  

To say all the front can do is add more lanes for cars is ignorant.  Read any credible traffic study and they all agree that traffic will always fill up the number of highway and street lanes to capacity.  That's what LA and Houston did and now they are massive sprawling metropolises.   You have to make it easy for people to get around without their only option being to drive.