I think what's happening is a lot of people who studied very little or no math are realizing a few 100 level courses in things like linear algebra, probability, stats, calculus etc would be very helpful. They might not realize that the cost/benefit beyond that is minimal. It's similar for many subject areas. A couple 100 level courses in accounting is super helpful, same for finance, law, mechanical engineering, electrical engineering, computer science, biochemistry and on and on.