It's not new seeing this, because I'm the recent past I have seen people turn out victims of what they usually advised people against probably because bat some point they were constrained and could no longer stay disciplined well enough to adhere to the advise they even give out.
Borrowing to gamble is definitely not something any One should consider at any point, this is because of the too many uncertainties attached to gambling, you almost can't tell when you are going to turn out lucky with the casino and if it turns out you aren't Lucky especially when you stakes the money you borrowed it becomes a problem for you because you will have to pay back your loan regardless of the circumstances that befell you.
There is a saying of "walk the talk". It is very easy to just simply talk without taking an action or internalising the saying. Everyone could fall for this, so we all should be wary of it.
Concerning borrowing money for gambling, this is absolutely a bad decision. Disregarding the financial condition of the borrower, I think playing a game like this, should not necessarily come from money they didn't have. It is not a matter of uncertainties, but rather a common sense. Gambling is an extremely high risk, any lender should take precautions when lending money to a gambler if they state the reason for it is to gamble.