Why do people care so much about the well-being of rich celebs?

People on social media are asking for prayers for Justin Bieber because he contracted a virus that caused half of his face to be paralyzed. He's one of the richest celebs in the world. Getting the best treatment is easily affordable for him. What's the point of worrying about celebrities, whose lives are better than yours might ever be?
Why do people care so much about the well-being of rich celebs?
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