You are correct but at the same time you are not, esports in theory are no different than any other sport in the sense that in order to be profitable you need to know a lot about the esport you have selected, however the main difference strives in the fact that esports are relatively new and the updates to the game can make it literally a completely different game and casinos have no way to accurately price the games as they do in traditional sports, which means it is easier for the player to get an edge over the casino if he knows the game very well.
The last part of your post is interesting and makes a lot of sense. Esports is a new arena to Casinos, but I guess they will partner up with a lot of pro players to get a good overview of how to distribute the odds between the competing teams or players. However, they are not on the level of calculating odds as they are for other sports. Very good point.
) is almost a win every two bets: like most of you said, they pick they lowest odds but they multiply with their bankroll a lot. 
