There must be multiple levels to this. At Apple, at least for a time, there was the overriding idea that "It should Just Work." That was supposed to translate to every part of Apple products. So clicking on stuff in the Finder should just work and AirPort WiFi should just work and so on. What exactly working meant was totally context dependent, but the additional detail that minimal effort and oversight should be required was broadly understood and teams that made products that failed that test were repremanded and reorganized if their products were not outright cancelled.