Many people have committed suicide due to gambling depression, not because they feel pressured by gambling, but because they can't control themselves due to excessive losses.
Perhaps suicide will help them overcome the depression or debt they experience, as people who gamble to the point of suicide often gamble with other people's money.
These individuals are usually quiet and don't share much with others, making it difficult to get help.
It is their responsibility as they must know that gambling is risky if they bet irresponsibly. All casinos have warnings, reminders about Responsible Gambling and even without those messages, careful people must organize their finance well enough in order to assign small part of their fund for risky things including gambling.
I am thinking about "suicide" and I have to say that that is actually the height of irresponsibility, to take your life in avoidance of the debt you have accumulated from gambling. Only irresponsible people will take their own life because of gambling, a responsible person will realize how irresponsible they have been gambling and will try to make the responsible choice of ensuring to pay back the debt they accumulated instead of taking their life which seems like the easy choice for most persons who consider suicide.