I've edited your post just to focus on Everest.You might imagine that the prospect of an adventure with a higher-than-normal chance of killing you would be a turn-off. But for many well-heeled travelers, the risk is precisely the point.
“Part of the appeal of Everest — and I think it’s the same for the Titanic, going into space, or whatever — is risk,” said Lukas Furtenbach, founder of mountaineering firm Furtenbach Adventures.
“And I think as long as people die in these places, it’s part of the reason people want to go there,” said Furtenbach, whose company offers a $220,000 premium option to climb Mount Everest with unlimited oxygen and one-on-one guidance.
Has anyone examined the waivers involved in climbing Mt Everest? Do they exist?
Here's one link, waiver at bottom. Terms Of Services And Waiver Agreement | 8K Expeditions
Someone wanting to climb Everest should, - at least used to have to - be extemely fit and experienced at mountaineering, from years of increasingly rigorous climbs etc. Because you don't just get on a ski lift, it is from intense personal effort, skill and endurance (as well as luck with weather). I hope they don't just accept anyone with money to pay, but who knows anymore.
JMO