Nothing is impossible in the world, but I don't create room to believe that we have some gurus who have actually perfected playing and winning gambling. I see everyone who says they are gurus are people who are just deceiving themselves or already know the truth but are just looking for some form of recognition from those close to them for whatever reason it might be.
The problem with gurus or people involved in these things is that at some point others will realize they are fake, that their information is false, and that they may make money initially, but it won't last forever and they won't be able to make it a profitable business on the contrary, it will collapse, it won't be profitable, and they will lose their reputation simply because of the deception.
Ofcourse any gambler that is calling himself a guru in gambling is deceiving himself because as long as you continue to gamble you will lose your win back to the casino except the win that you withdraw and enjoy. In this case the real gurus are the casinos because they have the house edge and they always win on the long run, that is why it is a thriving industry. If you win in a casino it is not because you have outsmarted the house it is simply because you got lucky to win, even in skill based games your experience is not enough to give you guaranteed wins. When you win be thankful for your luck withdraw it and enjoy yourself because winning is not guaranteed another time.