Adolescents usually hate the things their parents are doing, and after twenty most men and women lead a lifestyle that is completely different from their parents'.
I think it depends on the kind of parents they had. I never hate what my parents had done when I was an adolescent. In fact, I admire them for their hard work and understanding. I think the only thing teen ager hates about their parents is being strict. But then it can be communicated.
What can I say? You've got great parents then, hard working to support you, and understanding, and that is also the support any teenager needs. After all, they weren't gambling addicts, were they?
But that's just your case. You are lucky, mate. Your parents served as a good example for you. In so many cases I know, kids survived only because they were doing the opposite to what there parents were doing. And I mean gambling addiction in the first place. Kids from such families don't want to even hear about gamling, let alone engage with it.
Parents can become a positive example or a negative one, however it is way easier to learn from parents which provide a positive example as the only thing you need to do is to imitate them, however when it comes to learning to not engage in the same behaviors they exhibit, this is way harder, as at first you need to recognize why what they are doing is wrong and then find the inner strength to resist the temptation to do the same, which is why we see so many kids which repeat the same mistakes their parents made.