Why is race and ethnicity discrimination more important than gender discrimination?

There may be some individuals who make the argument that racial and ethnic discrimination are more important than gender discrimination because the disparities between the minority classes and the "discriminator" class are more pronounced than the gender differences, but this strikes me as a silly argument. Racial and ethnic discrimination, although more disparate, is less entrenched than gender discrimination, especially as concerns men who join traditionally female gender positions. The idea that a Black person could become a successful lawyer or doctor does not seem as "ridiculous" as an educated WASP man choosing to be a house-husband.