because AI is still human-made and programmed according to the creator's wishes.
So If the creator is really smart, why he doesn't play directly and get rich just by playing and betting himself?. I think his victory before was just a coincidence, just look what happen after, your friend always got lost and lost. This mean, the AI don't help you to win your bet. You have to be realistic if gambling only made for human not for robot.
As we know recently AI has been performing very well in many areas, so we can't rule out AI giving more accurate predictions than a team of analysts. If many famous personalities say that AI is the future, it means that sooner or later it will be used in forecasting. Besides, we cannot know which analytical companies and bookmakers are already using AI in their work. But it seems to me that AI is clearly already being used.
It might even be recommended soon to use AI in everything we do including betting. As of now, chat support reps are even using openAI and this is according to my friend who is a chat support and an ELTS teacher.
There must be some developers by now trying to develop AI for sports prediction. The more this question about AI betting prediction on different websites, the more there is means a lot of demand for it.