According to the story "The Use of Force," what career or life example could I use to support my argument?

I have to say that your question is not too clear at all.
What specifically are you trying to prove in your argument? That of course will impact
the answer to this question a great deal. However, just considering the story generally,
it appears you are trying to find a similar career or situation that can be related to
the events narrated in this excellent short story. "The Use of Force" concerns the
conflict between a doctor and a young girl, on whom the doctor needs to perform a throat
culture to see what illness she has. As the girl refuses to have this process carried
out on her, the doctor is forced to violently subdue her and to force her to open her
mouth so that he can find out the information he needs. What is ambiguous about this
process is that, although on the one hand he needs to carry out this test for the public
good, on the other hand he also recognises that he delights in the struggle and the
physical violence he is able to carry out on the girl.

I
wonder if we could find a comparison with any job which involves acts that are
unfortunately necessary for the greater good but involve pain and suffering for the
person concerned. For example, for me as a teacher, part of my job is grading and giving
bad news to both students and parents about the progress of students and their work.
This has at points been damaging because students and parents have had to change their
hopes for that student and what he or she can achieve and do in life partly as a result
of what I have to say. This is an important aspect of the teacher's job, because it
would not be fair on the student or the parents to let them continue to believe that the
student is capable of doing or studying something that is clearly impossible. However,
the difference is that I do not enjoy or take a fierce delight in this act, as the
doctor did.