there are more sheer cliffs, there are taller mountains, and there are harder routes, for sure. but what makes a cliff, a mountain, or a specific route inspiring is harder to define than its physical countours. there's a mountain in Argentina called Cerro Torre that is seen my many alpinists as the holy grail of mountaineering. it's about 11,000 feet tall, and has a neighbor to the north called Fitz Roy that is even taller and has more terrain on it. but Cerro Torre is steeped in history of climbers making their own attempts on it, and has features peculiar to it that make it seem impossible.
on the other hand, within the alpinism/rock climbing community, Everest isn't actually even seen as the Mt Everest of climbing. if you read Jon Krakauer's "Into Thin Air", he elaborates on this. the commercialism associated with the mountain, the way it is treated by guided parties, and the way it is seen as a bucket list item that anyone with the means to hire guides can haul themselves up, all serve to detract from the appeal of the mountain to the "true" adventure mountaineer. I say that a little toungue-in-cheek, though. if any alpinist had the opportunity to climb everest far from the crowds and without the $50k price tag, they would probably leap at it immediately. the point is, even Everest's stature has fallen in prominence among many alpinists, in favor of more technical peaks (though exceptions are readily available). it's been this way since the 60's and 70's.
the 60's and 70's were the time that yosemite climbing began to really take off. warren harding climbed the nose (the most prominent and popular route on el capitan) in 1958, royal robbins climbed the sheer northwest face of half dome in 1957. from then on, legends like chuck pratt, yvon chouinard, john long, jim bridwell, john bachar, peter croft, ron kauk, and lynn hill, all made their impact on the cliffs of yosemite. many of them went on to climb in the greater ranges of the world. yosemite for a time was a melting pot of the finest pratitioners of the sport--until you could no longer spend an entire summer in camp 4 because of overcrowding.
fast forward to modern day, it's still the proving ground for so many rock climbers and alpinists around the world. to climb the most prominent cliff in the most historically meaningful place still has power that captivates. some of it is its accessibility, some of it is the beauty of the mountain, and some of it is the difficulty, but much of it is simply legend.
