Most people really don't care what browser or search engine they use as long as it gets the job done. I wouldn't call it lazy or stupid, it's just the reality of humans who have to pick and choose what they spend energy on. Yahoo search has been around a few years longer than Google and it sucked (and still sucks), that's why people decided it was worth going elsewhere. If you're going to try and wrench people out of their comfort zones, you've gotta put on a better first impression.