First of, I just think that many people are playing slots games online and even sports betting is majorly online now because people are no longer limited to information or the online gambling platforms and sports books. Even in my country, online gambling is very popular now but still, many people visits the land based casinos. In my country, there are some clubs that has casinos and there's no night you will visit there without finding multitude of people there, meaning that both offline and online gambling is still booming.
However, some countries are much more ahead of others in the number of gambling addicts, because, probably, the government takes a shadow policy there so that the local population and, of course, tourists play gambling. For example, this happens in Japan, Australia or Las Vegas or in Krasnaya Polyana in Russia.
Of course, the question for any government of any country remains open: do they want to see part of their population prosperous and happy, or forgetting reality in gambling?