Yep it is. You can never brag it if ever you win millions of cash from it like you tell people that it's where you earn your money and bought the expensive things in life. People will still see it wrong and they will not praise you for that and will advice you to stop.
Yes that is right, it is different from person to person, if a person do not play gambling in a good way and he is losing a lot of money, then gambling is really bad for him.