10 years ago, nobody thought people would want to watch others play video games. Today, Fortnite has a $100 million yearly prize pool. But, everyone knows about video games and the player base is gigantic. Most young people play video games.
People don't know about pinball. They certainly don't know about competitive pinball. People don't have access to pinball. Player base is small (but growing).
Pinball is limited by being pinball, not by any lack of entertainment value. The current streamers do a great job and I always find the broadcasts to be entertaining when the commentators are focused on the action. I think broadcast pinball is doing just fine without ESPN.
Broadcasting of pinball events has grown by leaps and bounds but will always be limited by pinballs lack of popularity among the masses.