What should I do if one of my parents strongly wants me to pursue a career I don't desire, and they become upset when I express my feelings about it?
You must keep respecting your parents in every situation but your career is your own choice and no one can force you on a career against your own feelings. You must maintain a balance between your basic right to pursue your selected career, and keeping your parents feel respected and never cause them feel ignored by you or been looked down by people.
Wassalam.