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).
https://escharts.com/top-games?order=peak