Class reductionism is basically saying that disparities that appear to be due to race, gender, orientation, etc. are really just economic differences, so if you can "fix" the economic bit the rest just solves itself.

The term is, somewhat ironically, often applied in a reductionist manner.

Uh... I think that is more palatable viewpoint than blaming them on genetics

Who here blamed genetics?

Robin DiAngelo explicitly said "Biologically, race isn't real. But socially, race is a very real set of socialized worldviews shaped by segregation and superficial anatomical features. The white experience of both the majority and systemically powerful is one which normalizes a rejection of the existence of our own bias and enables us to ignore the existence of radically different lived experiences."

A bias towards normalizing whiteness and being blissfully ignorant of the lived experience of others is being blamed, not genetics.

I think that the alternative is supposed to be official policy of pushing some groups away and unconscious racism/sexism.