I throw out food when it is bad, not based on some arbitrary timer.
I don't understand why the idea that an average person gives themselves food poisoning often is rocket science here.
I think most people simply haven't looked into food safety material enough to integrate a probability that they had a food related factor when they feel sick and therefore conclude that they have no food risks in their daily habits that would equate to a small risk of a major health incident in a centralized kitchen, etc.