It's just another phenomenon that gamblers often assumes that they have some control over the outcome of their bets especially if they have been doing it for a while even though every time is just purely random there's no skill involved. Take dice for an example we might assume that we can control and influence the result of it by throwing softer or harder or in anyway that our brain recognize a pattern and keep tells us it's a way to win the game. So let's discuss about it.
The illusion of control does exist and yes, they do some ways by considering it as a skill that they have. But unfortunately, they also do not always win with the way they think is a control that they apply in gambling. There are so many gambling games and for me, all of these games basically require luck to be able to win, because if you think you can win with skill and control then you should be able to get rich from gambling, but in reality more gamblers experience defeat and worse makes their social life bad too.