Where You Stand Affects Your Opinion

Because you see different things:  Ran across this instance this morning:

Every set I’ve been on has had an ethnically diverse crew. I see how directors might not clue in to the lack of diversity of their work because they look out onto an inclusive set. The principal actors onscreen are only a small percentage of the entire body of employees. What they forget is that the rest of the world only sees who is put in front of the camera, and they are hoping to look into a mirror.
From a Vox post by a Chinese-American actress.

This sort of thing occurs with race more generally, dating back to antebellum days:  Most blacks lived on large plantations with large numbers of other blacks and small numbers of whites; most white slave owners lived with small numbers of slaves; most whites weren't slave owners.