Along with luck it also depend on experience of the player to gamble. Especially in the sports betting where there is not mostly luck require but the most thing which is required for to bet correctly is the knowledge about the sports. While a person do not have any knowledge about any sport and he will bet on these games then he will definitely totally depend on the luck alone.
This is only partly true because it still needs luck . You could try to bet on all favourites team to win however you might not be getting profit in the long run, I've tried and this is sucks. We wont really need prediction or analysis or anything at all just go and bet for the team with advantages such as the favourites team