Why do many people look down on car repairmen?

Looking at the phenomenon of society as a whole, most people think that the working environment determines whether they live a good life or not. They think that sitting in the office is the best thing, even if they have to be targeted by colleagues or bosses, criticized, and paid. It’s not very high and can be copied at any time. On the contrary, they think that repairing cars is dirty and tiring. Even if the salary is much higher, they are not willing to do it. There are many people who think this way, which reflects to most people, so there is professional discrimination, even if the job is It's very good, but it will still be looked down upon.

I also feel that the salary for technical work is usually higher than that for office workers, and technical staff do better. . .