\- Would you blame an individual who becomes addicted to gambling because it is wired to his DNA?
This is too much to believed already. Gambling-habit is related to DNA?
What's the connection of this? Not all articles you see on the web is legit.
-Can their gambling problem be put in check by regular methods?
Gamblers are just human regardless of what culture they used to.
It's obvious that any forms of gambling-related checking or what you are trying to point out are also applied to all people. I don't see any reason why should they be exclude on the usual checking methods.
-Will the addiction be worse than someone who picked up the habit?
Same as answer as above. They are also human therefore addiction will depend on how far they will managed it along the way.