CRITICAL thinking is a sign of good education and general creative active thinking.
NON-CRITICAL thinking is a sign of underdeveloped passive thinking.
Everyone has critical thinking. When we eat a bad apple from the market, we automatically critically select a higher quality apple next time, discarding the bad ones. Rarely does anyone survive if he does not have such critical thinking. benefit to others. "It is another matter if an excessive level of" critical thinking "becomes a sacred cow, when we notice the bad in any product and with special pleasure tell about the shortcomings to everyone we meet.
The ratio of critical thinking in different people is important. If everyone had extremely rational thinking, then people would have the same brains and the same psyche. And this is no longer biology, but robotics.
I propose to put the question differently. What would happen if people were thinking more critically than they are now? I can suggest one important consequence. Since the history of society is cyclical - recession-rise-recession-rise, the curve of development of human societies would become smoother. The function graph would become more rounded. In practice, this would mean that the crises of society would become less severe (less abrupt transition to higher mortality, less abrupt transition to economic crisis, etc.). And the ups and downs in the life of society would also become less abrupt and rapid. Well, in all spheres of life, the same thing would happen. For example, our emotions would become less explosive and more lasting.
On the other hand, such a slowdown would never lead to a straight line of development, since external factors also affect humanity.
Critical thinking begins to work in those issues that are vital to us. Everyone is endowed with this important ability, but if it is not used, then it disappears. Then one becomes a "vegetable". Likewise, if a person, evaluating himself and his abilities critically, comes to the conclusion that I am not competent in such and such an area, he begins to act only in the sphere of his influence and competence. As a result, it may seem that this person is indifferent in some areas. This means that the priority of the importance of these areas for him is lowered, but he can think critically in other areas. Also, a special view of the world and its internal laws can lead to indifference to politics, sports, new technologies, news in the world. The level of critical thinking of any person can only be revealed in deep communication.