As a student finishing up what will (hopefully) be my last full year in high school, I am going to have to say that I would prefer, and plan to, pursue a major that I am passionate about, instead of one that will financially be practical if I don't gain admission into medical school. Not that the possibility shouldn't be considered and thought about; but, I see undergraduate as a time where one should absorb as much as possible, take advantage of and participate in as many opportunities as is reasonable and just, in general, experience. Yes, make sure to get your prerequisites in and put quite a bit of effort into them; however, also explore what (other than medicine, or whatever doctorate you may be looking to pursue) you are passionate about and don't sacrifice your happiness. Personally, I know that I would suffer from some intense amount of frustration, boredom and psychological torture if I ever had to take a business or economics course.
Please, if one feels that I am wrong, correct me! I am not pretending to be an expert in the least. I'm simply a high school student with a lot of goals, hopes, loves, ideas, opinions and an immense amount of passion for medicine and all that it is and can be. I know what I want, and I'm going to fight and work to get there. And, if I don't - well, I know that's a good possibility. I would never want to leave the field completely. Lower-level research positions, advocacy, perhaps even some form of graduate school (MA, MS, PHD, etc) are all things I would look into. Of course, I don't want to think about not getting accepted; but I will certainly spend time planning and exploring other options, just in case.
By the way, I'm not entirely sure what I want to major in and, thankfully, the school I'm in the process of gaining admission to won't require me to declare one until the end of sophomore year. So, for now, I can more or less relax, focus on my prerequisite courses and explore what I am truly interested and impassioned about. Specifically, those things would be biology, chemistry, anthropology, sociology, psychology, history (especially WWII and Holocaust studies), cultural studies and a little political science. I'll be required to take a language, too, so Spanish will likely be thrown into that mix. My school also offers a major by the name of, "Social Change/Social Action", which also sounds like a good fit. They also allow students to combine them, and even create their own. Perhaps, I will try to craft a major that focuses on the psychological and social-cultural factors of health and disease, and how to use that approach to implement reform, better access to care and encourage good health. I don't quite know yet; I still have time.
Cheers,
Erika