The market for regular food was completely saturated before fast food and highly processed food entered that market. The shittiest chefs weren’t outcompeted by the best chefs. The market for regular food shrank a little perhaps, but the total market might have tripled in size. No one had expected back then that a) people would get this fat on average and b) that there would be this many people alive. I agree with your conclusion but it’s naive to believe you see the future because you understand the past.