IMHO, the gambler will eventually realize that the care is there from the true friend that suggests him to quit and doesn't tolerate his addiction.
He may think as much as he can that he's not getting help and they're not real friends. But as we have said, real friends will never tolerate their friends for their bad actions.
And those actions are going to put them into a bad situation that they may have hard time of getting out.
Yes, awareness will definitely come after someone experiences feelings that are unfair to themselves, even though behind all that there must be a reason why other people have carried out this behavior towards the gambler, with the aim of making the gambler immediately aware and able to stop being addicted to gambling.
However, if the gambler can restrain and control his emotions well then the friendship will be fine, but if the gambler has a tough character and is easily emotional, the friendship will definitely be strained.
It is the gambler's problem if he's got a tough character when he can't adjust even if he's the one in need. In need of loan and in need of someone to be there for him.
That's the hard thing nowadays when you're in need and you cannot adjust your attitude and you're the one having trouble to your own life. And when your friends give you advises on what you must do to have a good ending, you will not like them because you'll justify that you are living your life in your own.
Yes, because of his tough nature, he thinks that he is good at managing himself in gambling and he also feels that he is the right one and doesn't need other people's help in any form.
And it's true what you said, this is something that is very difficult to improve in the form of better self-control because people like this are not easily given good advice, in fact they just ignore it and think that good advice is just nonsense.
If we meet someone like this, it's better to keep quiet and see how long it takes for him to realize that he will immediately stop the selfishness within him and let him realize his bad behavior himself.