If you ate the fruit it would be much better for you. Instead you are basically taking something healthy overall, extracting the candy part out, and throwing away the parts that are best for you.
We started drinking juice to replace cereal in the morning and to increase our vegetable intake. This morning, I just happened to only use fruit.
I'd bet that eating the fruit & vegetables would be better. But at this point, neither my wife or I will be eating kale or celery for breakfast. Juicing helps us at least some vegetables in our diet. Baby steps.
If hewere drinking the fruit juice in place of Mountain Dew it might be better, but I doubt he was chugging Mountain Dew for breakfast before he started drinking fruit juice.
The problem is that people think fruit juice is healthy and nutritious, and they aren't aware they should limit consumption.