Yeah, yeah.
Look, there are many students in teacher preparation program who will never work as teachers. The system produces an oversupply of teachers, particularly at the elementary level–where one would expect to find teacher candidates who do not want to tackle advanced math. http://hechingerreport.org/colleges-producing-too-many-elementary-teachers-data-says/
I would not leap to the conclusion that these test scores reflect the abilities of successful teachers employed by good school districts.
Education majors have lower unemployment rates than STEM majors, according to this study: https://www.cgsnet.org/ckfinder/userfiles/files/Unemployment_Final_update1.pdf