Why does Mr. Calloway keep a white person as a member of the band in Bud not Buddy?

In "Bud, Not Buddy," Mr. Calloway keeps a white person, Miss Thomas, in the band to bridge racial divides and demonstrate inclusivity during a time when segregation was prevalent. Her presence highlights the theme of unity through music and the importance of collaboration across racial lines. Additionally, Miss Thomas's role reflects the changing dynamics of society and the possibility of acceptance in the face of prejudice. This choice reinforces the band's commitment to talent over race.