But the real purpose of gambling is entertainment so you can't get much entertainment by playing inside your house by just looking at your monitor,in that case the traditional gambling have upper part we can get fun out there and chance of meeting new people that is what considered as real entertainment.
Also, traditional gambling is not that much addictive. A common issue with online gambling is that you might get addicted to it. There had been a number of cases where people got addicted to gambling. They start ignoring their work or study for this and spend all their time online. This is not correct and there should be proper balance in life.