It is very important to remember that this is an unbreakable rule, for example I have read cases of very talented poker players that made a lot of money during their professional careers but they were not very good when it came to managing their money and as such many times they found out themselves in economic difficulties and they borrowed money from the banks in order to gamble, and even if they were good at some point things did not went according to plan and their economic situation got even worse.
I have read about people that were once rich before but they were no more rich later, some can be linked to gambling, because some people had a luck day or time and won big, instead to divert the money won to business, they use it to gamble and expecting more return, it later lead to borrowing in bank and the opportunity later turned to brokenness.
Banks as lenders will be careful if anyone borrows because they will get interest income on the loan so they continue to provide attractive offers to people who need money. If the borrower reasons to delay the payment, the bank will easily confiscate the collateral until the person can pay the loan money. This is the difficulty that must be faced by money borrowers who want to borrow money from the bank because if they have no income, they must have money to return and they also have to make ends meet. This is why it is highly discouraged for people who want to borrow money from the bank not to do so because returning the money can be difficult for them.
This is the reason I have not preferred to leand money from bank, also other places like online lenders, they have high interest rate and the longer the time the money is not paid, the more the interest. It is highly unwise to borrow money from bank to gamble.