Unless you are sure you have a good story to narrate, something that has best seller material- training to be novelist is an utter waste of your time. And taking big loans to do it is financial suicide. The net result is you ending up being a junior editor of sorts working for some portal trying to correct spelling mistake in news articles submitted, sincerely hoping automation doesn't take over your job.
'Making a living' is a very different thing, and frankly kids need to be taught its one thing to be passionate about something, and totally an another thing to monetize it. Your passion might not even be in demand to the common masses, you can't blame them for it. I for once never felt the need to listen to poetry. On the other hand I love listening to songs. Its not the worlds mistake to not want what you like doing. And moreover its not necessary your passion must always overlap with your day job. You can try towards doing that. But don't bet your whole life and financial security on it.
Next comes, a realization that needs to get into young people early on. Unless you are super lucky, big money will come only with big work. Studying history or philosophy is not very valuable to the world, or at least there isn't a pressing demand for it.
When you look at all this things at once. People need to make pragmatic choices in life. Choices which make sense. Again you can point out examples of people who have made it big doing something non-mainstream, but I promise they will be so few you can count such people on your fingers.