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?
That's a new low in victim-blaming. It's not Hollywood that's racist - it's black people!
To try to make this clear by analogy, one of the reasons that #OscarsSoWhite is a meme is because if black children only ever see white people winning Oscars…they won’t believe that they themselves could win one (and there’s 95%+ white winners for all acting categories in the Oscars). Having visible role models is important. Having discussions about equality and representation are important.