The five horses deemed NRs under rule H6:
The first two ran in NH races and were well adrift of the main body before the field came under starter’s orders. To make both non-runners was the only logical decision. The first one on the Flat had a gate failure, the 2nd one got it’s legs STUCK in the stalls and in the 3rd case the jockey couldn’t remove the blindfold. I think that all five decisions are 100% reasonable.
The Benvenuto Cellini rule doesn’t even come close to those mentioned above, imo.