Because cloud is not a location.  It's a series of design principles.

• Cloud-First Experience
  Your application teams get the same “as-a-Service” network experience on-prem that they get in a public cloud
• Cloud-First Consistency
  Your IT team gets the same tool chain to manage both on-prem and public cloud networks
• Cloud-First Infrastructure
  Your network team delivers a resilient, scale-out, commodity-based design across your enterprise cloud deployments, no matter where they’re located