Well no, the conclusion was that the available inefficiencies should be just about enough to pay the salary of an average person working in that field. Since sa

Well no, the conclusion was that the available inefficiencies should be just about enough to pay the salary of an average person working in that field. Since salaries in that field tend to be really quite good, it's going to far to say that the argument suggests that this is irrational. Instead, it suggests it would be irrational to expect to be able revolutionize the field or otherwise contribute substantially more than those already practicing.