I might be way off. This is somewhat graspable, but I know I can’t turn it around and actually say it myself. So I have a question to help me fill in what I might be missing while reading this.
Isn’t a difference between producer and economist also implied in the amount of information necessary to perform the job thus a producer will have managerial while an economist does the same in a way (peer review)? Also the producer is working within a system that fails in real-time at times as consumers may reject the product. The producer doesn’t always get it. And in a way, same for the economist. Which goes back to economic subjectivism to help further explain why there are these limitations. Which actually then goes to what you said about an economist, “tries to show how inefficient the market is”, whereas the producer could put the blame on the consumer not buying the products, but it could stand to reason that it’s a terrible product and the economist has terrible theories or simply replace the word “terrible” with “limited”?