Since it's based on a true story, it gives a sense of authenticity. Viewers can feel the rawness of the situation. The real - life basis means that the emotions, the struggles, and the injustices are not made - up. It makes the movie a more powerful tool to show the real problems that existed, like the unfair treatment of African - Americans in the justice system.
Well, it makes it more relatable. People know that these things actually happened, so it hits harder. It's not just some fictional tale of woe.
When a story is based on truth, it has a certain gravitas. 'If Beale Street Could Talk' benefits from this. It allows the audience to connect on a deeper level. We see the real - life parallels in the characters' experiences, like the fight against false accusations. This makes us more empathetic and also makes the movie more important in terms of highlighting real - life social issues that were and still are relevant, such as racial discrimination and the flaws in the criminal justice system.