For a long time, consumer priorities were elsewhere.
After the war, they were concerned about having enough to eat, post-rationings. Then, as industrialization and the workforce grew, meals had to be convenient and fast food boomed. Then fitness became the goal: fat-free and sugar-free became the name of the game. More recently, with international borders blurring, palates have expanded to include global cuisines.
Each time, food brand and manufacturers have adapted to embrace these societal changes.