> I think it isn't a huge deal if an English or French or Social Studies teacher isn't great in math, but is otherwise a good candidate.

The test covers the grades 3-9 math curriculum. Not having that kind of basic math literacy is pretty big barrier to being able to evaluate, much less teach, Social Science materiak at the secondary level (the only level where you would likely have a dedicated Social Science teacher.)

And subjecting students to that kind of incompetence—as those from already-disadvantaged backgrounds will be the least likely to have a home environment that counterbalances it—is a far bigger force institutionalizing racial disadvantage than the test itself ever could be.