the person who first thought of conquering Everest. He thought of falling on Everest peak while crossing it by Aeroplane instead of climbing. He really bought a plane and arrived in India. Fortunately he became sick and couldn't make his deadly jump.

You have quoted a good example, when we take any action against nature we incur huge losses, in which life is not guaranteed. Same way there are many challenges in human going to extraterrestrial space, in which life is not guaranteed.