No one gives a shit if you can walk on a tightrope. If that were the case why would you even do it at height? The whole point of the stunt is the risk. Take the risk away and it becomes humdrum. That's why the best performers fly without a net. The death risk is the show.
To his credit, the performer did not want the safety harness. They made him wear it. He knows what the show is about.
If we must do evil to prevent evil there is nothing worth saving.