No offense, but that sounds like a pulpy wet mass of disgustingly clashing flavors. I think a lot of people would rather take a daily multivitamin and a fiber supplement than drink that. 
That and the difference in cost is huge - nuts and fresh fruits and vegetables are some of the most commonly marked-up foodstuffs in many places. Even if you live somewhere that can grow them locally and don’t have to foot the bill for their being shipping halfway around the world or at least across the country, they still cost substantially more than a couple bottle of pills, even if they are somewhat more efficacious than processed pills.
Again, the poorest segments of society are the ones most likely to not be able to afford fresh or even frozen produce. Their diets necessarily have to consist chiefly of carbohydrates, fats, and proteins, and even if they do get a little extra money to feed themselves with, they’re more likely to spend it on eatting meat (compared to beans and other protein providing plants), rather than springing for fresh veggies.
