Primarily because the price of industrialized foods is much lower than that of the natural ones, and their preparation is much more simple, so it becomes a more viable option for meals. I think the biggest disadvantage is the price or if you do it at home, it takes a lot of time. Certainly people know that indutrialized products do not do well for health and that natural ones are the best option as it is more complicated to make natural choices in the day-day.