At what moment did you truly experience the wealth gap?

I used to work as a salesperson for digital cameras. In 2019, an 11-year-old girl wanted to buy a Casio selfie camera priced around 5000 yuan. After leaving the store, she didn't like it and directly threw it in the trash. I found it very hard to understand, feeling like there was such a deep and distant divide between two people that was difficult to bridge.