On what ratio do you use to rate the gambling chance of winning and losing to be 50/50? Because I see gambling having a higher chance of winning over the gambler, the gambler most of the time has a very minimal chance of winning in every game compared to how they can lose to gambling, the risk is far more than 50/50.
Even if the chance is still 50/50, like you said, it's too risky to use loan money to gamble because you are not just taking a risk on your own; you are also risking some other money, which is almost equal to risking your freedom.
Some games do have odds that are close to 50/50, not quite, but close.
For example in roulette, if you gamble on the color, say red. You have almost 50/50 chances to win, you will only lose if the ball ends up in black (half of the numbers), or if it ends up in 0, which lowers your chances. Of course most modern tables also have a 00, which lowers your chances even more.