I've heard that argument about Korea ever since I started following and working in eSports (around 2004ish). Yet, I'm still waiting on that big breakthrough in the USA/Europe. I'm afraid it will still take quite some time.
One thing to keep in mind with comparisons like that are that it's an average game against a weekend full of above-average games.
Still impressive numbers, but it's too easy to glance at them and think (and I'm not saying you were doing this) "esports getting more viewers than baseball!"