I’m assuming every party is honest in this context. If you just began climbing, and you decide to buy gear and attempt a difficult climb without the proper knowledge and experience

While there are riskier activities, I can't think of any that are immune to being made more dangerous by companies doing the wrong thing

There are also just stupid people. If you do everything right, and the guy you’re supervising decided to pull out his phone for a selfie or something and a breeze blows him off the mountain, I don’t think the employee/company should be responsible