Luck will always be on the side of those who work or make a living from gambling income, because they will try to master the game and will continue to play to earn income for their needs, and this happens to my close friends and even he has more income than me who has permanent work.
and as long as he enjoys and always earns income from gambling he will continue to play, and only God will change it because it has become his way and plan and there will be a good time to change it at the right time.
Lol that's not the case at all xD although luck chooses whoever it wanna be on the side of, it doesn't take time to swtich sides! Maybe your friends try to control their bets upto the point they need it and not play continuously as if they did that, the house edge will kill all money no matter the good luck!