I did some rock climbing at a time I didn't care whether I lived or died. I quit because I have no fear of heights. That made it too dangerous. I also avoid sports where the main magazine has a monthly obituary column. And I was disturbed that all the serious climbers all had seen a friend die. "I almost quit climbing then" they would say.
Rock climbing is possibly the most intellectual of sports. I considered a climbing gym but thought that sort of thing must be bad for your finger joints.
I prefer sports that seem dangerous but really aren't. Surfing, wind surfing, and river rafting. Nix on parachuting ( BASE jumping is even worse), wingsuit, hang gliding, small airplane flying, cave diving. I'm amazed at how seldom big wave surfers die or are injured, it seems unsurvivable. I guess it's so terrifying that all but the most fit and skilled are scared away.