CGB
However, we know that air show accidents do happen at a rate higher than other general aviation accidents
Do we?
I can think of a fair number of GA accidents in the last year and more notable than the number of air show accidents. Many (most) have been as a result of flight in marginal conditions. Fortuitously most of the fatal casualties have been limited to those on board.
Quite a list here:
https://www.gov.uk/aaib-reports even if some are simple runway excursions or collisions it is rather more than the air show accidents.
Damn, statistics always get in the way of a bald statement.