Why do some movies or episodes give false hope?

Anonymous

There was a soap opera about a HS girl getting bullied by some classmates. She pretends to be gone on vacation and disguises herself as ''her cousin Adriana'', some fictitious character that doesn't exist. She changed her hair style, got rid of her glasses, changed her clothes and stopped stuttering. All of the sudden (except her close friends who know the plan), all her classmate don't recognize her and it works. lol

If someone tried that in real life, you would get immediately recognized. It's still you with different hair style and clothes. Why do those shows give people false hope?

Why do some movies or episodes give false hope?
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