The Google and Microsoft stores are absolutely full of completely useless featureless apps, many of which exist only to trick you into thinking that it is something else.
My general mental rule is "could this app be a website"? And in this case it absolutely could be.
By this logic the overwhelmingly vast majority of the App Store's catalog shouldn't exist.
...and I wouldn't necessarily object to that outcome, but still.
More to the point: "Is this app interactive?"
I'm not convinced this one is. It displays information and allows the user to passively do things with that information (like adding shows to their calendar or buying tickets), but there's nothing the user can do to customize their experience within the app.
Browsing a list of events is nothing like it
Can't every app other than a browser, phone and messaging be a website?