Sometimes, a person really wants to do pursue their dream but they simply can't. It takes a lot of persistence, and it is EXTREMELY risky to throw a secure job away for something that a person only thinks they want.
One could end up destitute and homeless.
Nowadays a person can work both a 17/hr grocery store job and pursue their dream because of the internet.
That being said, I have spent the past four or so years pursuing my own dream. And I'm not going to give up anytime soon.
My advice: make a balance. Don't go to school unless you really want to study something in particular, or if you want a particular job. Find a part time job that is stable and pays a decent wage. Use your remaining time to build your dream career.
To be real with you, I'm jealous of that 17/hr job that person has.
Forgot to write this:
The grocery store job could very well be her dream job.