Chance-based games engage players by tapping into uncertainty and probability....

https://tiny-wiki.win/index.php/Is_Online_Plinko_Actually_Random_or_Can_You_Predict_the_Drops%3F

Chance-based games engage players by tapping into uncertainty and probability. The unpredictability creates a sense of anticipation as players consider possible outcomes. This keeps expectations active, encouraging focus and interest throughout