Have you ever prayed before placing a bet (gambling)?
Did it work?
I pray a lot and I'm also praying when placing a bet or rolling a dice, it doesn't matter if I win or not the most important is I am putting faith in my belief and the almighty, you can pray in any situation any place and any condition, it's beneficial in both body and mind and I don't see anything wrong why you should pray when gambling.
there is no one argue why you pray but of course there are others that don't believe in God or Saints meaning they may be disappointed when people are having like what you are doing.
faith at some point are indeed with others but in some this does not exist because they believe that gambling is not part of beliefs instead it is for luck and strategy combined .
If you feel prayer works for you, why not stop Gambling and get your hands doing better things ?
This might be someone's else's believe, maybe be it works,maybe it's just as a result of luck, or careful analysis of the games you picked.
just respect what others do believe and focus on your own, there are no barriers on what we must do so respect is the most thing to do.