“Why do you want to climb Mount Everest?” George Mallory – “Because it’s there.”
Alex Honnold is the predominant “free solo” climber around (climbing without a rope) and while he certainly isn’t conquering Mount Everest, the only realistic explanation for why he does what he does is the above quote.
Ascending El Sendero Luminoso in El Potrero Chico, Mexico:
2011 Feature on 60 Minutes:
Alone on the Wall (by National Geographic Adventure TV series First Ascent and Sender Films):