They say they don't believe that any children are more talented than any other children, and are advocating eliminating standard "advanced" courses, such as calculus, from the high school curriculum. The only classes that would be available in their proposal are the current remedial math track.
I think you've confused "straw man argument created by its detractors" with "the actual concrete plan being established by its proponents".
The (successful) proponents of equity based teaching are so far outside the mainstream that it's an honest mistake. (I made it, and now I'm furious.)