Not everybody is a fan of online gaming, I have tried some of my co-workers and friends to bet or try to play online game such as Dota2, but they just don't want to switch their gambling experience. They all loved betting with sports. Though, I agree that the eSports industry is generating millions of prize pool and income, thus attracting big time investors and gamblers to engage in eSports. The same reason why there are several TV channels available for eSports already.
There's just people who doesn't like online games.
Different people have different hobbies and it looks like that your friends are not that interested in playing games but they love betting in sports events.There's just people who doesn't like online games.
I have seen different Esports game emerge in the gambling industry and with the Esports industry growing year by year, I believe that there will be more and more gambling sites who will put Esports betting too. I want to bet on different Esports games like Dota2 or Mobile Legends if there is but so far, I don't see any sites or its just I'm not doing enough research
.