Right to say loan taking is not good for those who do not have skill about gambling but so may people I saw who has become millers with gambling and after winning they return the loan but we should take this risk only when we become fully satisfied about the growth and power of gambling skills. When you become sure that you won't lose take Loan but after all you are risking your money, I wish everyone end up winning in gambling.
Even let's say that I'm a skilled gambler, I wouldn't practice taking loans so that I can continue. That's not good IMO.
That's you, however, other gamblers can take a loan because they are willing to take a risk and they trust that they can win.
When you are in a casino and there are loan sharks their, you will never be granted a loan if they think you can't pay, so most probably you'll only be confident to borrow money if you know you can return that on time.
You're building confidence that much and too much isn't good for anything. You can't always assume good results even you are too good with it. Even in other things that you're good at.
Don't think that you can only pay when you win, how about your other income or your expected income, we borrow because we have that kind and not when we win because if that's what we are thinking then we will have a problem in the future.