morton - why the need to be such a party pooper?
Perhaps someone wants a career in music. Maybe they are good enough to make it into a top orchestra (or a solo perfoming career) or maybe they are not. The point is, they want a career in music - only the most hardened pessimist would give up on the idea of making to the top for fear of failing. If everyone were to base their decisions on money or what others think of them then art wouldn't exist.
I know that I for one am going to devote my entire last year at highschool to music. Sure this means that I miss out on most of the parties and social life, give up science and maths subjects which I enjoy and spend much less time playing sport but if this gives me even a slight chance at making it to a conservatoire it will be absolutely worth it.

Even if by a miracle I made it into a conservatoire, I might find that on leaving I cannot enter into a succesful performing career - but how will I ever know that unless I try?
I know you havn't said this outright, but your comments suggest (to me anyway) that I should give up on my dreams and pursue the less enjoyable but probably more lucrative field of science or law. To me, a life lived in caution is a life not worth living. I know I will make a much happier yet less well off piano teacher or whatever than I would a rich scientist.
I will certainly risk "just scraping along" if it means a shot at a successful career in music.
I don't mean to rant - it just bothers me that if I suggest I would like to go overseas to study music I am greeted with 'are you for real' looks whereas if my goal was to get to Harvard I would be encouraged and helped until I got there.