Perhaps you were just lucky. But if you play for a long time, you will certainly start losing. Mathematics is an exact science - it is impossible to deceive or outwit it.
That's what they don't realize.
I've been there and done that and thought that I was undefeated through dice. But that's not how it is really for it, we've got some rest days, lucky days and losing days in there.
With this, it's a luck reliant game that we can never win in the long run.