Here's why:
* Significant change: Forrest undergoes a profound transformation throughout the film. He starts as a naive and intellectually challenged young man, but through his experiences and encounters with others, he learns about the world, love, loss, and the complexities of life. He develops a deeper understanding of himself and his place in the world.
* Personal growth: Forrest goes from being a simple, unassuming character to someone who finds success and fulfillment in various aspects of life, including athletics, business, and love. He develops his own sense of purpose and identity.
* Moral development: Forrest's experiences shape his moral compass and his understanding of good and bad. He becomes more empathetic and compassionate, even as he faces challenges.
While other characters like Jenny experience change, their arcs are not as central to the film's theme of personal transformation as Forrest's.