Yeah, that doesn't really work. Base camp is still a long way from the summit. You have to train and be in decent shape to summit any of the 8kers in the Himalayas. I've read a couple books on the subject, "Into Thin Air" and "No Shortcuts to the Top" are pretty much the best on the subject. Everest is actually not the hardest of the 8kers, it's just the tallest. But it's all about the weather up there, difficulty doesn't mean anything when a storm blows through.
Sherpas are genetically different than the average joe. Their blood needs less oxygen. I just think that's awesome.
As to what drives people to summit mountains, I don't think there is a good answer to that. It's like a spiritual calling. Personally, anytime I see something really tall, I want to find a way to climb it. It's just a compulsion. It usually feels great when I make it. I've been looking at climbing Mount Shasta, but I can't convince anyone to go with me.