These days people normally are not doing what their culture "requires" from them. For example, Scottish people do not wear a kilt everyday. In fact, many people don't even follow the religion of their their ancestors, don't speak their native language and so on.

So, no way something like "my culture requires me to gamble" can be an excuse for someone's gambling addiction that. But if you are just having fun with gambling, "trying your luck", or whatever, and you have no problems with stopping at any moment, then you can say, just for the fun of it, "It's in my culture". I see nothing wrong with this attitude.