Context is important, Trelane was trying to relate to Kirk as a 18th Century Gentleman and so used the terminolgy and perspective of an 18th Century wealthy white male. IIRC Kirks response was more of an eye roll in the sense "can this guy be serious?" Similarly Lincoln in "Savage Curtain" was seeing Uhura through the eyes of an 19th Century white male. Whitewashing history to make it more paletable to the modern audience is dishonest and a disservice to the struggle for civil rights.