You are quite right that this is a simplification, a summary. l think such summaries can be useful.

But, hey, since you understand the complexities involved in measuring racism, let me suggest that you write an article addressing each complexity, with details and examples. Tag me when you publish and I'll link to your article from this one--and maybe from other articles I write on the subject of racism. I do write on racism fairly frequently since I grew up in the South in the 1940s-50s and had classmates who had lynched Black people.