Of course, there is a huge difference in games when you initially have an advantage in your knowledge or skill. Naturally, the probability of your winning increases. In this regard, if we consider purely random games, like dice, then the chances of players to win are simply equal in them.
Even with random game like dice, you will have to choose multiplier when playing and an experienced gamblers will not pick too high multiplier. It is like they make dice to meet wager requirement for wager contests. Experienced gamblers don't need to win big and they only aim at balance when they gamble manually or with dice bot. Chasing too high multipliers and big wins will cause you losses.
If we talk about sports betting, then someone who knows a lot in this field of activity always has a significant advantage in their bets. But a game like poker occupies an intermediate position, since the distribution of cards introduces an element of chance.
Football and team sports are more complicated as results can be changed by a single person and by a single moment. We don't know when those moments occur and sports are harder to control with our bets. Personally I only bet in sports for fun, just to watch a match with more emotion and that's all. I don't hope to get rich with sport betting.