History of technology is the history of civilization. The primary concern of all humans throughout history has been not dying. So the way that we have coped to mitigate this risk of not dying is by building infrastructure.
It’s this infrastructure that is unseen, because it is infra-structure, it is under the structure. And when you start thinking about this massive web of technologies that keep you alive, the only interfaces we have on a day-to-day basis are tap, turn, flush. Everything else is hidden and unseen.