From all my experiences , I can tell that there is no way to get profit no matter how many experience that we have. I have been gambling for years however that doesnt really make me a better gambler. In fact I still lose and sometimes win depends on how my luck goes so everything is still depends on luck
There is no guarantee in gambling and people already know that before gambling. But it is also true that many people do make money in it and so many people may find it profitable but I never found it to be so. I always rather lose more that what I win and so I consider myself unlucky at gambling. I rather prefer to use my skills and knowledge to earn money.