It's not like no one doesn't want to lending money to a gambler, it's more like lending money to a gambler that doesn't know how to pay back. Some people have this sweet mouth to request for money, they will make you all sort of promises to pay back but as soon as you gave them the money, you will be the one to be running after them to pay back and since debt isn't a police case, you don't have any power to hold them unless you charge them to court and that doesn't make sense.
It is possible that this business is only carried out by some of the closest associates to lend money to gamblers or the most likely to be encountered in this case is for offline gambling in casinos where sometimes in some places there is always a special room for us to borrow money in advance when we run out of money to gamble but there will always be something like this because in the end Although I do not recommend that gamblers do this (borrowing to gamble) but in one condition this loan is still legal because regardless of what the purpose of the loan is used for the borrower will not really care as long as there is collateral and the debt that the player borrowed must be paid of course with double interest because this is also a business for some land-based casinos.
It's just important in this case that the role of the players is not to be too eager because doing this without really careful consideration can destroy ourselves with the gambling activities we do.