I agree with you, it can destroy a relationship. It's like putting a carrot in front of a rabbit hole. where someone who has gambled usually they will be addicted to gambling and if we give money or lend them money it is the same as giving pleasure to themselves but there is no benefit for us because of the possibility of defeat that will be obtained, also people who are addicted to gambling are also unlikely to return the money that was loaned earlier, because usually people who are addicted to gambling when they have money they will not pay off their debts but will return to gambling in the hope of getting a big win that can pay off all their debts, and that is a stupid principle. because I have experienced it.
So in my opinion, don't try to finance gamblers because it won't work. most likely like that.
In most cases you’re right but there’s always some exception to this since there’s already a skill based gambling that gives skilled gambler advantage on the game. I can provide a little financing to this cases but only money that I can afford to lose since this is like an investment due to the advantage due to skills.
However this will always be a case to case basis depending on the behavior and mental state of the said friend or family even though they have the skills.
in this scenario you can already determine how you should do what is best for you and other people or your friends not to fund his gambling or lend him money because bad impacts can happen, for example you give loans to your friends too often even though your friends were not initially addicted. but because of the pressure of having to return your money and always losing he can become a gambling addict and indirectly you help him become a gambling addict and you will feel the loss yourself when he cannot return his money because of course an addict will never be able to manage his finances well so you have to accept that you will lose your money. so you will feel very painful seeing your friends become addicted and even lose money that cannot be returned.
in this case I will not blame you but remember money is a very hot item it can destroy everything just because of money and I fully support @Wapfika opinion if you can just fund a friend or other gambler as long as you have to see how good his skills are in gambling in this type of betting a skill based one like blackjack or poker and see if it has a job and if everything looks really good you can fund it with a small amount of money which will give you an advantage when you win because this type of game can be profitable as long as you have good skills.
so here I also fully support the opinion of @Wapfika