The proportion of households with a person with time and energy to prepare a healthy home cooked meal has diminished. We have sacrificed domestic life on the altar of profit.
It really doesn't have to take more than 10-15 minutes per day in total, you just have to be aware of what you're doing. I know several examples — including myself — who eat healthy food on a budget and spend very little time doing it. We had our problems with American-style food when it appeared and became popular (I had a BMI of 30.5 for several years and blamed everything but myself), but quickly self corrected before real damage was done.
