The problem is that it's not always clear that people are being irrational. Take the planning falacy. Is it bias, or is it politics? Your boss and / or customer

The problem is that it's not always clear that people are being irrational. Take the planning falacy. Is it bias, or is it politics? Your boss and / or customer might say they want accurate estimates, but when you give them, they say "that's not good enough". Before long, you implicitly know this, adjust your estimates, and hope for the best. You'll just make excuses and ask for forgiveness later. Now this isn't great business, and is an irrational system, but the individual players might all be acting rationally. I wish I had a better example where the bias / "irrational behavior", was purely rational. They do exist in other cases, but I can't think of any fire yours.