Money is the main reason why people gamble. If it wasn't for gambling, casinos won't be a booming business in our time.
People see it as a way to change their life where they won't be able to achieve just by working hard.
Even people that have a lot of money still gamble for the purpose of enjoyment so I don't think even I will stop gambling if I have a lot of money.
Quite contradictory views

It seems to me that most casino visitors are rational and play primarily for the sake of adrenaline and entertainment, and not for the sake of earning. We think that there are many "sick" on theme of gambling only because their terrible examples are very vivid and cause a strong emotional reaction.