Answer:
When a person works to pay for the expenses of maintaining daily living activities, supporting a family or raising other individuals, that person is doing noble work.
When that person works to contribute to society and build the common interests of the collective, that person is also doing a noble job.
When the work that that person does complies with the law, operates according to the policy of the state and contributes to the construction of the country, it is a noble job.
You go into a restaurant, give yourself permission to have a higher social status than a salesman or fix a car and give yourself the right to be bossy about the repairman, you are wrong!
Why do we look down on salespeople, auto repairmen, and so many other jobs? Because they always look disheveled?
All the work they are doing is not against the law, they are using the effort and knowledge they have to perform and they earn money to support their family. So don't judge them just because they don't have the same conditions and jobs as others.
Now, before judging someone's work, ask yourself if you are doing the right thing, do they deserve to be judged as others think?
And if you are shy about your job, then just drop that thought, every job is useful and noble, from an environmental cleaner to a security guard are silently contributing, contribute to society, will what you are doing be like them?