My parents were disappointed with fire/EMS as a career choice. I did it anyway, with no regrets. While I'm not full time EMS anymore, it's not because of money or because I disliked it, just because I wanted to get more education. It's a fun job, and despite most of my high school friends being highly paid lawyers, consultants, and the like, I was never ashamed of what I did. I'm also pretty sure I was the only person who really liked my job.
That being said, from your other thread, I would still go to college and get your bachelors in something (nursing is often thrown out but really it can be anything). Your parents are paying for it, as I remember, which is a huge benefit that many people won't have. Even if you stay in EMS your whole life, a bachelors makes you more hirable and promotable (at one fire job I had, you needed a bachelors to make captain, for example). And if one day you decide EMS isn't for you--which happens all the time, EMS is hardly a perfect job--it's much easier to already have a degree as opposed to trying to work and go to college/trade school at the same time.
You can still work or volunteer on the ambulance in college and get an idea of what you like. Just as an example, I worked with 4 or 5 college classmates on the ambulance while we were in school. One now works in fraud but still does EMS part time, one is a freight train operator (and does volly fire), one works in emergency management and does volunteer EMS, and three stayed full time in the emergency services-- two are state troopers, one of them highway, the other a helicopter medic, and me doing fire/EMS.
My point is, when I was a freshman in college I think I wanted to be an FBI Special Agent, or, depending on my mood, sing on Broadway. Some people don't figure out what they want to do with their life until they're like 40, so don't pigeonhole yourself into a career (any career, not just EMS) too early.