For certain notions of secure. Let's use the analogy of a house to describe the OS. Most organizations may trust Apple to provide the service of updating thei

For certain notions of secure. Let's use the analogy of a house to describe the OS. Most organizations may trust Apple to provide the service of updating their OS when new bugs (some security) are discovered, that is, they are comfortable giving Apple "maintenance door" access to the non-sensitive parts of their iOS device, to perform janitorial and construction services, and plugging holes in the house; and only Apple has the keys through the maintenance door.