>with strict opinions

Not really sure what you're trying to prove here.

As the Schneier says in the post:

Despite what the article says, I don’t know how mandatory this actually is. I know people who visited Saudi Arabia when that country had a similarly sketchy app requirement. Some of them just didn’t bother downloading the apps, and were never asked about it at the border

Well, surely you must install the app that holds your ticket to enter the stadium, and surely you must install the covid tracking app or be refused entry even with said ticket app? What are the alternatives?