Most of those kinds of gambler who take loans to continue playing or betting are addicted gamblers who needs help to stop their addiction, just the same with what you said, those who are trying to chase their losses that resort to barrow money to try recovering mostly turned to another bad position, losing the amount that they barrow and look for another resources or try to find someone who can lend them money, it adds up with the problem that's been created from the previous loans that being done.
They can't get of themselves and there's no resource for them anymore and that's why they're borrowing money to gamble. That's a common mistake we do see from the addicted gamblers and they will only realize it when they're already done or once they look at how much money they have borrowed to gamble. Very unwise move as we can see from them but that's what they think is a best move for them to keep on track with their gambling activities. Soon, it's not just all about borrowing but also with the potential of selling everything they own and the assets that they have if they will still be caught having no emotional control.