Mrs. Smith is just the generic name for the many millions of white people who go about their business and lives every day without thinking about race or how it affects their lives.
On a recent ESPN show Michael Wilbon prated about how race affects every aspect of American life. It's an incredibly ignorant statement, but it's a statement many black racialists (like Wilbon) believe. They think the world revolves around what they do. It doesn't.
Gotcha thank you