In many countries where gambling is a taboo - and people do not gamble because its not legal and its considered as a sin.
The people there can do online gambling and satisfy themselves. However - those people have a thought behind their mind if they are doing the right thing or not.
Gambling can be subjective. Those countries where gambling is a taboo has a very simple definition of gambling. Don't they realize that in real life we also gamble or take risks? Gambling is a form of entertainment, it only becomes a sin because most people get addicted to it with the mindset of it can make them rich in short amount of time, which only happens to very few people that are lucky. Gambling is a business to entertain people, they did not promise some returns.