In my opinion, gambling wins can be obtained consistently if you can control the number of losses. The problem here that I noticed is that your friend wants the jackpot for each game.
That percentage is very small in my opinion. The more often he plays, the more likely he is to lose more money.
If this type of gambling addiction continues, it may seriously disrupt one's finances in the future. he has to calculate how much money he has bet and how much he will get if he is still ambitious to chase victory.
So of course this is not a good idea, you cannot force victory to always come because luck is always unpredictable when it comes. Yes, I understand that at least the victory will definitely come but try to calculate all the wins and losses as long as you gamble with such methods, I'm sure the number of losses is far more dominant. That's right, if this situation continues then it is clear as you say that their finances will definitely be disrupted because they have to divide the allocation of money between living needs and gambling, like creating new problems.