I don't have much disagreement with this advice, but I think it has to come with the caveat that school these days isn't simply about earning potential, but weighing that potential against what you paid for school. I have a BA in history and a law degree. I paid a fraction of tuition for both undergrad and law school due to scholarships (I also worked during undergrad but didn't make enough to really put a dent in anything except room and board.) I consider myself lucky to not carry the same debt burden as most of my peers, but it is still ultimately an encumbrance and it colors literally every decision I make, both short and long-term. If you are like me and independence is a pivotal element of happiness, you should consider if your academic passion will end up becoming a hinderance in itself simply because what you pay and what you can earn won't balance out.I would always suggest studying that which you are passionate about rather than that which will make you the most money.