The point stands though. It is either safe for groups of people to be indoors for more than 15 minutes or it isn't. Theme parks, while they try, do not succeed in actually being some fantasy universe where the rules of science don't apply.
It's not the same thing. It's not just a matter of "indoors for 15 minutes" - they're trying to stop groups of various people from rotating through the same air. The science says that a common spread is 15 minutes of exposure to contaminated air - that's what they're trying to stop.
Take that imagined Staples Center show. People will be sitting in roughly the same space for the duration of the show. They'll be exposed to other people here and there, but for the duration of the show, let's say 90 minutes, it'll be a small group of the same people. There's not much cross-exposure.
Compare that to something like Philharmagic. Every twenty minutes, they'll cycle a brand new group of people into the same air. Over and over again. In that same 90 minutes, you'll have five entire groups of people exposed to (roughly) the same air, each person for at least 15 minutes of the show.
The more people you put in a room (like Philharmagic) over a given period of time, the more likely it is for the room to get contaminated.
Even an indoor restaurant would be better than that - each patron would be in the same general place for the longer duration of their meal. And if capacity is low enough, the tables far enough apart, there would be little risk of exposure.
Tiki Room shouldn't open, for the same argument I made two weeks ago - it's a small, poorly-ventilated room. As I said before, I would be fine with it opening if they could run it with the doors open. But I also doubt DL would want to deal with the maintenance costs if they could only run it with 50 people inside.
I could understand someone saying that the state was being overcautious. But this isn't inconsistent - they're matching the rules up to the science.