Good point, Fionn. I felt a need to keep my job, so I did what I was told. I was very young at the time and had a lot to learn about life. I think I might choose differently at this point in my life.
I have turned down a job because I told the potential employer that I could not help to kill an animal under such circumstances in the future, and he told me he couldn't guarantee that I wouldn't be required to.