[imtringued]

>because they have very little to do with each other.

Not everyone has $180,000 lying around. Someone has to pay for it and if it's not your parents then you have to do it yourself so obviously people prioritise degrees with well paying jobs and that's how it's supposed to work in an efficient economy. Otherwise if you can spend $180,000 on something without intending to get financial value out of it, you could just as well do something random such as buying a lot of bananas.