@winner3699 I agree with Roller here—it really comes down to the specific game. For standard house games like slots, roulette, or craps, the math guarantees it’s purely luck over the long run, no matter what strategy you use.
However, games like poker or blackjack are a different story. In poker, skill dominates because you're playing against other people, and in blackjack, proper basic strategy (or advantage play) directly impacts the house edge. So while luck dictates any single hand or round, skill is what makes the difference in games where strategy actually affects the outcome.