Ed Haywood
En-Route
Nothing about the process ensures only pilots with world class skills and judgment end up flying in front of crowds. The actual evaluation maneuvers are quite simple for any decent aerobatic pilot, even weekend warriors who have have had good training and who have above average dedication to the art and safety of aerobatics. YouTube is littered with videos of "airshow pilots" drilling holes in the ground because their skills were inadequate for what they were attempting.
This has long been an issue for me. I had two good friends in IAC who died flying acro. Both were mediocre intermediate competitors who bought unlimited-class monoplanes and tried to become airshow pilots. One died practicing for an airshow. The other died giving a demo flight. Both would have been better off continuing to climb the competitive ladder.