I play gambling many times and i still do not find any success in gambling because players won't get any benefit from gambling. Players do win a huge profit but it won't last long they will still lose all of it in gambling if they still play. Only the owner of a casino and dealer who get success in gambling not players.
I do not think that 5% people can claim that they have made money in gambling and are succeeded in gambling. To me as i know about most of the people around me who are related to gambling, but still i cannot see a single person who have made a good amount of money from gambling and now stopped playing gambling any more.