Probably because many (most?) people don't take or know about the subject tests.
I thought I had never heard of them, but after looking at wikipedia, it looks like they were called the SAT II when I was in high school. I remember that existing, but never knew why you would take them and never knew anybody that did.
It's not a stretch to imagine people being confused.
I thought I had never heard of them, but after looking at wikipedia, it looks like they were called the SAT II when I was in high school. I remember that existing, but never knew why you would take them and never knew anybody that did.
It's not a stretch to imagine people being confused.
https://en.wikipedia.org/wiki/SAT_Subject_Tests