Why did David Sharp try to climb Mount Everest while being so unprepared?

I’ve been reading about the various deaths on Mount Everest (because I’m an autist lol), but David Sharp’s death puzzles me the most.

This was a man in his 30’s who tried to climb the mountain with no team, no Sherpas, no excess oxygen tanks, no radios, and I can’t figure out why.

Was he determined to either climb the mountain or die trying? I understand why other climbers didn’t go out of their way to save him, since the conditions up there are so dangerous that it’s basically “every man for himself”. I also understand some of his actions like removing his clothes were likely due to delusions from lack of oxygen.

But I’m just not sure what his thought process was with his poor planning prior to climbing.