It is puzzling to me too that some people just want to climb, with no care as to what it is they are on of what difficulty, length or complexity. This is puzzling because, to me, there's a ton of joy to be had in just the opposite approach. I love studying guidebooks, anticipating routes, and, especially, checking off as many different routes as I can.
Some people are different though. More power to them in finding fun their own way.
Hell, speaking of differences, here's one that is even more shocking: some people like Bud Lite Lime. God, some people even think that Bud Lite Lime is beer. Now that's a difference that is just about inconceivable.