If you think the carbs in veggies, fruit, and other produce should be counted in the same way and regarded the same as carbs from processed foods, you're an idiot.
They're not nearly the same, and our bodies handle them differently.
The problem, weight-wise, with produce isn't the item itself but what it's most commonly served with or how it's prepared. Potatoes are great, but stuffing it full of butter isn't going to keep the weight off. Broccoli is good, but smothering it in processed cheese is what adds the pounds. Apples are wonderful, but covering them in caramel doesn't help your waistline.
A little butter, a little salt, or a little cheese is fine... but that's not what most Americans go for; they go for a lot of everything.
I should also add that snacking and soda are probably the two single biggest reasons for weight gain, aside from physical activity level.