Math/statistics can raise the odds of you winning as far as gambling. I'd never do the digital casino thing, though. I use online for sportsbetting and go to a casino for anything else. Good luck!
Yeah I definitely agree in this, maths can help when it comes to sports betting and some card games (poker). As far as slot games go.. I wouldn't trust any system when it comes to that! Roulette and black jack i only play at land based casinos.
I sort of agree with you because there are times when a person needs to calculate various aspects in poker or even sometimes in Blackjack because there are times when you are tempted to hit the next card while actually holding back is the rather better option mathematically but mostly it's all about luck and the control over one's gambling.
Personally I do find that maths can help you in rather restricting yourself from gambling because one who knows math will quickly realize that winning against a house edge is almost impossible and in the favor of the house. Apart from that maths I cannot think of any other way in the helping of a gambler, yeah sometimes it can be good to calculate parlay bets and sometimes to do arbitrage.
In poker it is all about probability and reading your hand correctly and putting it in a run of 1000 poker hands. How many times does it beat "X" hand with "Y" board etc.. There are also other factors in play such as your opponents and how they are playing. As far as Black Jack goes I don't trust it.. I tend to stay away from it but there are people who can do similar calculations as with poker in it, again, you run it over several hands and not just the one you are playing right there and then.