Huh? League is bigger than dota 2. By like a lot. Because League has much more mass appeal than dota. And that was their point, it has a dedicated but niche fanbase.
My previous point is that League, DOTA 2 and Dota All-Stars (which is where Icefrog comes from, and not from DOTA 2 as the guy maybe believe) are basically the same thing and they all stem from his legacy.
So saying this game is “basically DOTA 2” is, well, a much bigger deal than he seem to realyze.
My point about baseball and polo, was about his distinguishing between the number of watchers and the number of players, which is not relevant because MOBAs are huge no matter how you look at them (like baseball in comparison to polo).
MOBAs are tiny, it is a genre that has maybe 3-4 successful games since it was invented 20 years or so ago. Sure, each of those games was moderately successful but compared to other genres that have had hundreds of successful games in the same time frame it is just not very appealing to large numbers of players. It is, however, very appealing to the players it appeals to, which is quite different.