A more useful examination would be:
Why are the govt still dictating 50% of energy intake should be from carbohydrates?
This is clearly going to cause weight gain in anyone not visiting a gym 3 x a week (which is most of us, unfortunately)
The low-fat high-carb diet advice has a lot to answer for, not least the growth of a monstrous diet food industry pumping people full of horrific chemically-processed food.
If this article had a point at all, it should have been arguing for more physical activities in nurseries and primary schools, not bitching about women working. Totally unconstructive.