What are some stupid themes in movies that rarely work in real life?

For me it's these

- Your former school bully is poor bum on the streets and you're a millionaire CEO with perfect social skills or a famous celebrity

- A skinny 120ish Ibs woman beating up every single men, even the ones that also know martial arts; Ronda Rousey couldn't beat her male counterpart and she's a great fighter.

- Assassins shooting bullets in all directions and you have excellent fighting and reflexes to the point of not a single bullet landing on you

What are some stupid themes in movies that rarely work in real life?
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