I think between luck and experience 75:25 in giving victory. playing online or offline gambling the opponents we face, equaliy have experience, if against Bot, the developer surely make a Bot program that will not be easy to defeat by opponent. and match experience will not much affect for winning in every match.
so I think a luck is more needed than experience.
Playing against the bot will be a horrible thing we do cause it will never give us a chance to win, it is program already. We can see any chances of winning when we play offline or against another players.
If we want to be a successful gambler, then we need to focus on gambling and spending more time in casino in order to learn a lot. But if we think that it can be easily achieve or haven't that wide adoption in gambling environment, it probably making you sick and quit.
I am sure about the games which are skilled based for if you have what it takes to win, the probability of winning at gambling would not be difficult for you. Luck is another form of randomness and you just cannot rely on random things to make money. They rarely happen and you do not know if they would happen. So better rely on your experience, knowledge and skills for they can save you.