Unlike NBA, I think it's more expensive to maintain a bubble for esports like LOL. In a way that they also have to provide fitness for the players inside the bubble to maintain their health and safety.
But if that's what they will come up with, it's going to be the same audience as the NBA, audience will still go online. I don't find it that much difference with online tournament if their LAN is going to be like that.
If it is like that the audience is not the same as before but people can still watch online since they will stream it online for sure. It would be great for other to be able to watch when they can't watch in person due to limited audience. All in all, watching online will be a safe to do to avoid health problem.