Why do you assume there’s debt involved? Whether BS or not, people with degrees have higher earnings (~2x on average according to the FED) and pay higher taxes (more than 2x on average); it’s very much in the government’s financial interest for more people to have degrees.
That suffers from the stereotype fallacy. Some majors have huge ROI while others leave graduates very frustrated with their prospects. Not everyone will benefit from a degree. Not all degrees are financially sound.
If people think that all majors tend near the average, they are mistaken. Some do very well, others are of dubious value to a career. Averages hide ugly realities.