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.