"Oppa, can't you even do it by putting your finger in and turning it?"

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It is said that the reason people fail to properly apply what they have learned in practice is mainly due to differences in the environment.
In education, teaching usually focuses on core principles and major case studies, making it impossible to cover every single environment.
Just the fact that things are different can be stressful, and if you even face interference, it is said that it is not easy even if you have experience.
That is why adaptation and seniority are important, though they may not be as crucial when you are working alone.