I'm sure I don't REALLY need to tell you this, you seem to already know, but for posterity. This is your life, don't let anyone tell you otherwise, not even parents. Don't waste your precious time doing things you'll end up hating, because at the end of the day, you're the only one that has to live with it.
It's great that you know what you want to do, personally I didn't for a long time. Now at 27, I'm having to go through the whole system again, I wont see my dream job until at least 35. Now not only will I have uni debts, but college debts too.
I do advise having some kind of backup plan however, maybe take something you can tolerate on the side, just in case. But follow that dream, don't let it slip, by listening to your parents. They will come to respect you for choosing your own path, some take longer to accept it than others, but in the end they will.
Letting go of you, so you can make your own way in life, is one of the hardest thing a parent has to go through.