This is a big one.
Forrest is often bullied because of his physical disability and low intelligence.
Still, in rhe present not all public places have fair accessible, Also, most entertainment events are not accessible for the handicapped.
Related: 4 Why Is A Millionaire Wearing Such Ratty Shoes? All out of rounds, but still being fired on by mortars, he used all he had left: a propaganda shell.
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In the movie, Gump is a completely decent character, always true to his word.