There is people that make a good living by gambling in sort bets. It's not the same as full on gambling, you can really study hard teams and their statistics and try to decide what to do. In the roulette or slots or dice, you cannot research anything contextual beyond pure raw statistics of the amount of times you play.
Honestly in my own i can't live in gambling because there is no assurance that actually you can make a good earnings in gambling.. maybe for others but i think they are no always win and make a good profit in gambling it is too risky that you can gamble there with large amount that can gives you large win profit if you lose you can be lose a large .. Everything in gambling is more on luck that skills or experience..
Some can make a living with gambling but majority of as can't as we do not have the skills they have. Since most of us are losers our loses goes to the gambling sites which make them richer. In other words, we are not choosing the right battle as we are fighting a losing battle, thus accepting the reality helps as instead of rooting for money, enjoying in gambling would be a more positive approach.