If you were lucky enough to win big at the casino it would be a disgrace to be robbed just after it, however if you feel insecure you could ask some of the casino staff to escort you to your car and they will do it, as it is obvious casinos do not want that their lucky players lose it all because they were robbed as this will create negative publicity for them, still this is not a guarantee either as then you could be followed by the people trying to rob you and you could still lose your money anyway.
Maybe the casino already provides escort facilities to the winners of its big prizes so that they don't have to look elsewhere, which will cost money and time to find a suitable one.
This will be a plus service that the casino provides to its winners so that they can guarantee their security in taking their money home or directly to the bank.
It seems that the casino has such an escort service because the casino also wants to pay attention to the safety of the people who gamble at the casino, especially the big prize winners.
But some casinos will give you free stuff and ask you to wait until the money can be cashed out so you can leave the casino with your money.
But be careful if the casino offers you to gamble again while waiting for the money to be counted because that could be a way to lose your money if you continue gambling.