It's really an academic argument. No matter how much invested, the prospects of a job are few and far between. One that provides a liveable wage is even more rare. They holy grail airline job hasn't been advertised for about 5 years, unless you already work for one. A330 type rated only thank you.
So what's the point? It's like buying a broken down car, it costs money and will never get you anywhere. Flying schools pumping out pilots on VET-fee help might make money but where are all these pilots going to go? An already saturated industry where regionals are closing down once a month?
Oh, and the 150 hour course is only GST free if your dodgy flying school doesn't refuse to refund it.