I'm not sure how dangerous this is. Its an aid assisted climb, so ropes are on, and taut the whole time. Climber uses the gear to get up. Assuming an adult is checking the gear all the way up it shouldn't be that crazy. It just takes a long time and is strenuous.
I had a friend die at Yosemite due to a falling rock. She was wearing a helmet too.
yeah, and bad weather is a risk too. But riding a bike and other kid things face similar risks.
I had a friend die in Silicon Valley due to a car crash. he was wearing his safety belt too.