Because it's an important aid to getting to a high-paying job in the US, not just a means to learn.

One need only look at the resume filtering process, a once manual bias that has now been codified into algorithmic bias with AI. A degree from a good school boosts your chances immensely, and other facets such as coursework don't matter much.

If you have ever seen someone filter applicant resumes, you will understand instantly. There are too many, you have to filter them somehow and the allure is irresistible.