I would say the problem is people blaming the proximate but not the absolute causes. In a lot of cases, society sets people up to fail and then blames them when they do. In your overeating example, the problem is that we have tons of highly available, cheap, unhealthy food being marketed to you 24/7. The proximate cause of your obesity might be that you eat too much, but the absolute one is a combination of capitalism, technology, and human physiology.