I'm not rich from gambling but you can become rich by gambling with a lot of luck of course. I think if you have this luck you should never gamble anymore because you can only lose it again in my eyes..
There are only chances in getting a profit in gambling because risk will always be your enemy in it, and I think some people have won because of chances and there ain't more people that are getting a lot of winning even if he is feeling lucky but there are gambling methods that have large amount of chances of winning and that is sports betting, and poker!
If we see practically then we would be always on loosing side since there is a house edge. If we see theoretically then there are 50 people who loose money with gambling while only 5 people win with gambling. So, why we all think we would win with gambling ? I think only optimistic people can think so.