>Yet there's plenty of food in the photos, and it's ice cream, soft drinks, burgers, hot dogs, etc., the same stuff routinely blamed for the obesity epidemic four score years later.

That "plenty of food" was not 24/7 bombarded into the population with ads, not was it 90% of a supermarket, portions at restaurants were much smaller, and the sugar content was less. Plus most people, and for decades more, cooked and ate at home.