I can't agree with adult diet day

I find many of the "day of x" and anniversaries in Japan make sense. Some are just entertaining. There are a few that are completely ridiculous. But every now and then I come across one I just can't agree with, because I dislike the idea. For example, adult diet day. Which is today and October 7th annually. 

The date was chosen because October, the ten (10) can be read "Oto" and the 7th as  "Na" = "Otona". The idea is to promote health to adults on this day. But they could have, should have, taken a whole other angle on it. Promoting dieting is not the way to promote health in my humble opinion. It is no surprise that a dieting organization, the Adult Diet Research Institute, established this day as adult diet day. Surely their 'research' should have pointed to the dangers of mass promoting diet for no apparent reason. 

Eating habits are important for all. Eating habits does not equate diets. Nutrition is also very important, something that can be depleted through reckless dieting. While diets have their place for some, I really don't think adult diet day is a good idea. What do you think?