You are aware that Apple doesn't own its own chip fabs? That its hardware is manufactured for it by third parties? That the building space for most Apple Stores

You are aware that Apple doesn't own its own chip fabs? That its hardware is manufactured for it by third parties? That the building space for most Apple Stores are leased from malls and landlords? Every enterprise builds on infrastructure owned by others. That is what contracts are for. What matters is the degree of lock-in and who controls the roadmap. And the whole point of modern "cloud" infrastructure is that you don't own the hardware, you don't have the capital costs of the datacenters, you have a nice temporary lease that you can nonrenew or perhaps even break if needed, and your internal architecture is probably generic enough to be ported to another cloud if needed.