Luck is what makes the gambler to win, when we apply strategy without praying for luck we won't be lucky to win a few cent because we are not lucky to achieve that win. However if we are not lucky with the strategy we use for gamble we have to change them to something new to see if we can achieve a little win. Lucky is the most important thing in gamble, even if you are gambling for fun or profits you still need to win because it makes you to gamble more as you are winning
Something that we must always remember that we must do it in the right way. It means we need to apply the right strategy and play the gambling games properly. If we don't do these, it is impossible to expect the luck. Even if luck is the most crucial factor for the success in gambling but it isn't something to happen suddenly with no reasons. We know we must understand the basic thing about gambling games. We also still need to do a simple analysis or research if we are joining a bet (betting). So the luck won't work if we gamble in a careless way.By the way, are you sure that you are praying for luck in gambling?
TBH, you look quite religious. I don't know if it is an effective way to pray for luck in gambling. However, no problem if it works for you.
If a gambler believes that gambling is really just luck when you win it, you should not believe in the algorithm that a casino platform has, but if you do believe that there may be a truth in winning, gambling is just luck.
What's the point? 
Believe or not, the algorithm in casinos makes the house takes the advantage. Since the chance to win is rather small, that's why many people assume they can win it if they have a luck only.