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.