The "there's inequity in *advanced* classes" argument does have merit.
Black kids are often misidentified as "not gifted" and white kids are often misidentified as "gifted." And then gifted kids get better resources, more attention, better classes, smaller class sizes, that makes the gifted label a self fulfilling prophecy.
The solve for that may not be "No gifted programs for anyone!" It may again be "Reduce the racism."
Similar arguments are for sexism / non neurotypicals.