Erasure seems to be jargon with no widely accepted meaning outside of social justice. For now I will stick to what I perceive to be the average of the various dictionary definitions of racism. By that meaning, not talking about or thinking about ethnicity is definitely not racism.

> if black children only ever see white people winning Oscars…they won’t believe that they themselves could win one ... Having visible role models is important.

I think you're saying it's important to have visible role models with the same ethnicity and/or sex, and/or whatever other bodily attribute we're focusing on at the moment. But why would anyone think that unless they already have racist and/or sexist beliefs?