As much as possible it's best to avoid blaming other gamblers for their addiction since it wouldn't help their situation and it's only going to bring down their morale. Then again even if it didn't come from their DNA it's still their fault for not being able to control their problem.

There are different ways to handle someone's gambling addiction so it's always possible as long as the gambler will put in some effort as well.

I doubt it'll be worse because one's addiction level still depends on how long they've started doing it.