True, and honestly I do not understand the mindset of gamblers who force themselves to take loans just to realize their desire to gamble, and one thing I will say is that they are gamblers who come based on a misunderstanding of gambling so that they do not hesitate at all to take loans just to gamble which is actually rationally the worst decision because after all it is the same as you taking two risks at the same time, first you have to pay the loan and second when you lose it will cause significant disappointment and annoyance.
Those gamblers who take loan to fund their bankroll are either impatient of have come into something of a strategy that they thought would give them huge amount winnings.
Obviously those impatient people can't wait for their monthly salary and is very eager to play. As a result they borrow money from their friends promising their salary as payment.
While the other group might probably discover some strategy, tested it on a small amount and thinks it was a successful strategy because they are able to win (maybe many of us have seen this kind of situation where a gambler borrow money or ask some sponsor because he had discover a "sure" win strategy).
On the other hand, as you said, many gamblers who destroy their lives become even worse after they use the idea of borrowing to realize their desire to gamble and that is indeed true, in the end, in most cases the pressure of the problem of being in debt often makes gamblers take crazy decisions like ending their lives.
True there are lots of gamblers that have ruined their lives but I believe we should classified these gamblers. They are irresponsible gambler, does not practice self-control and just follow the urge to gamble without even trying to resist the temptation. These kind of gamblers are those who ruined their lives.