there is no way you can get back what you've lost in gambling. You get in trouble for debts, trust me.
what makes you think that your statement can be Universalised ? of course you can get back what you have lost ,its just risky.
you look too negative on gambling or have faced some crap in the past.
maybe he is talking based on his experience but of course not everyone have the same experience with gambling, some are too lucky to be true and some are too unlucky to walk the earth and the later is the one who will ask or borrow money for gambling.