Fruits and veggies are carbs. So, being heavy on the carbs may mean you're eating more whole foods, and getting more natural vitamins and minerals. There is even a high-carb diet that has some followers - and they do lose weight. A high-fiber diet was kind of popular, and some people still follow it, and it is 'high in carbs.'
In short, carbs are varied. Just pick the ones that give you the most for your calories (fiber, etc.)