First, the purpose of students' education is to exercise their brain power and thinking intensity, so the characteristics of knowledge systematization are obvious. For example, students learn chemistry from inorganic chemistry, then analytical chemistry, organic chemistry, physical chemistry, physical organic chemistry, structural chemistry and so on. Emphasis on gradual progress, perfect structure, orderly flow, rigorous and comprehensive.
Second, adult training does not emphasize the systematization of knowledge. The oldest saying that has been said so far is "what is lacking makes up for what is lacking", not seeking systematization, but seeking practicality. For example, some presidential classes and executive classes are not systematic academically, but patchwork is exactly what people need and are interested in. In other words, adult education focuses on practicality (of course, this is based on performance management and practical interests, which actually causes many troubles and hidden dangers to the healthy development of adults themselves), unlike student education, which focuses on academic rigor and system.
Three, although the above two kinds of education and training have their own characteristics, they are essentially different. The object of student education is students. Students have no direct contact with society in their way of life, so there is no direct pressure to survive. Therefore, the content of learning needs depth and breadth, and the learning method aimed at exercising thinking naturally cannot be directly transformed into productivity. Of course, on this issue, some special schools, such as vocational and technical schools and some colleges and universities, are facing direct competition and survival pressure (lack of advantages in social recognition of cultural level), and their emphasis on students' education must be on practical skills, which is also the main reason for the mutual distribution of students trained by these schools and the high employment rate.
Faced with the pressure of social survival competition, adults will naturally choose the most direct and effective way to improve their competitiveness. Under such pressure (students can't be mentioned in the same breath), systematic learning is obviously no longer the first choice, but a straight line of learning, so-called what is missing, what to make up. Therefore, it is very common that adult training is not refined, and it is enough that what you have learned can solve the immediate problems. As for things like principles, they are not attractive to them in practical value.
Of course, if this is the case, the competitiveness of adults in society cannot be really accumulated. People say that today's society is impetuous, and one of its manifestations is to seek only small profits in front of us without seeking a solution. True leaders and elites are always the few people who know what they know and why, grasp the root causes and solve problems with their hands.