Whether the judgements from experts in a field are the only important judgements? The speaker claims so. However, I deem that the speaker's opinion has some prejudices. Admittedly, judgements from experts have their merits, but we cannot assert that other judgements from un-experts is valueless, nor can we confirm that every piece of judgement from expert is correct and useful.
  At the beginning, I must concede that experts'opinions have significant importance. Since they being well-trained in certain field, and having much more information and much more accurate appratus than ordinary people, they stand on a more benefitual place than others. Thus, experts often judge things more effectively. Consider the horricane Sandy, which was attacked East coast of the America. The experts' opinion forecast it several days before it arrived. Thus, the lost of economy and public health are greatly reduced. Another compelling example is the stock market. When economy declined, many people were threatened by the shrinking of stock value, many of them faced to bankcrupt. However, those who have expertise of economy were always safe, even make money in that time.
  However, no one should neglect the fact that experts are confined by the limitation of theories. Experts are always make judgements via some theorodical systems, that make sense, but sometimes when the theories are invalid, experts usually cannot figure it out, especially in those fields that are not been well-developped,for example, the forecast of earthquakes. To forecast earthquake accurately is a problem that always confuse experts, but meanwhile, many ordinary people have learnt some useful ways from life, such as the animal's abnormal behiavor, the cloud shape of sky, etc.
  Consider another example from a company makes soap box. It is a great challenge to select the empty soap box mixed into the boxes with soaps from assembly-line. One international company hired an expert team to solve this problem, then they build mathematical models, addopted many theories, and finally did it after several years. However, a worker from another local factory solve this problem simply with some great wind blower to blow off those empty boxes. This example tells us that experts sometimes limited from the laws, theories, and rules, thus fail to solve problems even when an ordinary people solve it successfully.
  In sum, I admit that experts' opinion is important, however, we cannot blindly believe what the experts says and ignore judgement from other ordinary people.