In our hometown, there's a known description if the person starts to become poor and he's a known gambler. People on there will start to blame his misfortune 'because he's a gambler'.
And that makes others aware that they shouldn't gamble too if they don't want to share the same fate. In my personal life, it didn't affected my personal reputation. I think it's still depending on how you handle yourself and the situation.
I don't see it as a negative thing lol. Actually, if the man indeed became poor and lost his fortunes due to his gambling habits

he can be a fine example fot those who lack self-control. But obviously, the man must be supported too and helped and not left alone.
Yes, in some country, being a gambler will have a bad image in the society. But in another country, that thing will be a normal thing as in that country, and many gamblers have the same things as him. But that will be easy to blame someone if he becomes poor because of playing gambling.
I agree that a person needs to be helped to solve his problem so he can rise up from his downs. But that person needs to realize that what he did before was wrong and it cost everything so we can help him to get away out.
So far, I think the bad image will come to us if we cannot control ourselves in gambling, especially if we become poor by spending too much money on betting.