The reason for that is that white men control HW and they would never cast an attractive minority man cos they fear losing white women. Have you heard abt the Japanese actor Sessue Hayakawa ?
https://www.dazeddigital.com/artsandculture/article/32658/1/sessue-hayakawa-japan-hollywood-film
Women were crazy abt him and then he was typecasted in only villain or stereotypical roles
Then why Keanu Reeves, Vin Diesel, Will Smith, Denzel Washington, Zendaya,Dwayne johnson are big names..😆
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