Non-White models being 4.5× more likely to be plus-size suggests casting directors still associate thinness with "mainstream" beauty while relegating diversity to niche categories.
possible, but the stat doesn't prove the causal story. A 4.5x ratio could also reflect that the plus-size category was built largely around Black and Latina consumers (who statistically have higher average body sizes in the US), so brands cast to their actual customer demographics...