To be honest when I think of Gladiators I think in terms of WWE wrestling more than I do MMA. As it is meant to be more of a spectacle.
Even Cirque du Soleil carries more risk of death. The corpse removal process is seamless enough that the show continues.
I was shocked to hear this and looked up a Wikipedia article [0]. Given their reaction when a performer died (abrupt stoppage of the show with full refunds), I think you're making this up.
[0] https://en.wikipedia.org/wiki/Death_of_Sarah_Guyard-Guillot