If someone wants you to pay 200K so that you can earn 200K a year, it is a good investment.
The problem is that colleges and universities have been trying to sell you on the idea that ANY degree program MUST be worth a virtually infinite amount of money invested with NO consideration of ROI.
A good rule of thumb is that your investment in education/training should not exceed your projected annual income after graduation.
Remember the graduate should be expected to generally interact as a self-sustaining adult upon graduation. They should not have to spend another 10 years living with their parents while they pay off their students loans before they can afford to pay rent and a car note.
A person with 50K in income and a 200K loan has a debt to income ratio that makes doing things like buying a car or buying a house problematic before they even get started in life.