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.
We just have to consider what they love, if people are already working, I like to assume that they are not playing online games anymore because it requires time to master the games, and some of them are not really a fun, but with male workers, they love sports because they play it also.
Like me, I play basketball and I Idolize a lot of NBA players so I thin sports betting is suitable for me as it gives me a feeling that I can win since I know the game very well, at at the same time I'll be able to enjoy it.
I'm a fan of esports, I'm into Csgo and Dota 2. At the same time, I still understand what you feel about other people still wanting the regular sports they've been watching because I missed it too. It is still different watching a real human playing. Really miss watching basketball and baseball.
And I agree its hard to understand the esports with high prize pool, specially to those who are not technologically advance gamblers. Still remember how hard it is for me to understand when I first play those games, the graphics and so many buttons to click just to play it good. They can play other easy games but I don't think it will fun as much as the sports they love in the first place.
I think it's all well-connected. People are missing an energy coming from sports rivalry and the same thing coming from betting world. It's not that easy as it seems at the first glance. I would like to bet on smth interesting but betting is not like gambling for amateurs. You have to know smth about the discipline you bet on. Without it's practically meaningless.