Do they? Not necessarily making an argument for or against the original point, but to me airports epitomize "slow and tedious". My hunch is that they also don't handle nearly the volume of people/time that major stadiums do during event entry.
That's the security check, of which id check is only one part. The bottleneck is everyone needing to take out their laptops and then repack their bags. Same with boarding. The bottleneck there is people putting their luggage into the overhead compartments.
Here’s a wild idea, tie tickets to a drivers license/photo id number, and scan the id.
Edit guess that doesn’t work for kids. Start the tickets at 10k and drop them by a percentage a day. Automatic price discovery. Rich people can just buy them whenever they want.
Maybe a bit of a dystopian situation but ... I think this was 10 year ago now I went to an Utada Hikaru concert where I had to upload a picture of myself on a dedicated website and when the tickets were scanned I think they had access to that picture