Gambling is not a sin that's because gambling is an entertainment that lets people have fun and enjoy themselves, people think gambling is a sin and its not okay that's because they always think that gambling and greed are the same things. Greed is a sin which people thinks that every time you gamble you are doing a sin, but it doesn't work like that some people just gamble for fun or for entertainment. They don't associate it with bad things or do bad things that's because they are just trying to have fun. Greed is the on to blame on because sometimes people get too cocky and when they win they will play more and more until they will lose all of their winnings, that's greed and people should understand that.