- "University degree" is a heterogeneous thing. While there is such thing as non-economic value, the strictly economic value of a college education tends to cluster around a small subset of degrees.
- Many countries have enacted policies to increase proportion of people who get degrees. Far from fixing inequality, this has instead diluted the value of university degrees.
- All universities are not created equal. While it is possible (and even common) for employers to pay too much attention to the reputation of the school, it is also quite common for students to over-estimate the value of a no-name institution. I've found this to be moreso the case in the two European countries I've lived in for an extended period of time (France & England).
- The exorbitant debt incurred by university tuition in some countries (which need not be named, I think) means the ROI on the university degree has to also be exorbitant.
Have I missed anything?