The thing is that you don't know when you are going to win.
You can win in your first bet. Or on your 100th, or never.
That's just how probabilities work, you never know what's going to happen, you only know the odds, but the actual results can vary.
Yes, that's true, and it keeps people trying and hoping they can win someday. They may not count how much money they have used to gamble and lost at gambling. They just want to win from gambling. But to get success in gambling is difficult, and we don't know how much money we have to use before we can be successful at gambling. And possibility after possibility of winning will continue to make us try, especially if we still want to achieve that success. We should be able to respond wisely so that we don't experience large losses.
The player has some funds to win through gambling. Unless the casino has no provably fair feature or operates a 100% house edge, the gambler has some percent to win in every $100 they wager in a casino. Depending on how well they try to wager the money. Not talking about a player who wagers his money at once. Those who want to target the reward per $1000 wager, can be staking $50 - $100. Players looking at $100 can focus on wagering smaller amounts like $5 or $10 to enjoy their game till it gets to that threshold. However, it is not made to look this way in the casino, but the house knows a way of rewarding players, to keep them in the casino, thereby making more money for the house. If a gambler doesn't win at all, he won't be energized or motivated to gamble again. So, a gambler who's determined to take gambling as a career must know the house edge and the provably fair of the casino they want to make their office.
It's encouraged that the gambler starts up with a good amount of money and wagers accordingly to extend his days of gambling and increase his possibility of not running out of money. Given time he'll be earning some money to add up his existing bankroll. Thereby enjoying extra days of gambling. If he's well calculative he won't run out of money. But, the player needs to have spent years mastering the act of gambling, to consider gambling a retirement plan or a form of career for the long term. He may not expect to earn more profit, the gambler will not be in profit but can maintain his money not to finish. Moreover, if a gambler is not organized or has the skill to manage his money or be carried away to lose control of his plans, he should venture into such a risky game as a business. But the possibility is there to make a career in gambling.