Carnival Rides

Why is it that we put our faith in things like carnival rides, their seats barely fastened, their metal cages worn as they spin on rickety metal pieces, round and round? Why is it that we put our faith in stoplights, the shift from red to green? We trust it, as if these makeshift hanging bulbs will always be dependable, even so much as to save our lives. Why is that we put our faith in ladders, bikes, cars–man-made materials, pieces of constructed metal–but we struggle, find every excuse, when it comes to one another?