Well to my opinion casino should not be played for to earn profit from. Yes there are people who are making quite handsome and big earnings from the casino but these are known as the professionals. They work on it. For them gambling is their routine activity to go and to earn some from it. These are the genius and extreme lucky people.
AFAIK genius cannot make profits from casinos, yes your degree will not get you opportunities to beat the house edge and lucky people may not find possibilities to become professionals. Hence I am not finding any chances for those people to be existing in real life. Making profits from casino might be possible only in fictional stories.
People who got inspired by rumors do develop greedy opinions about entire gambling industry and keep trying to copy those fictional stories.