The primary benefit of a private registry is to ensure security and privacy for container images, especially when dealing with sensitive data and compliance requirements (such as financial or government use cases). While secure connections to public registries like DockerHub or GitHub container registries are possible, using a private registry ensures full control over image access and auditing.

Key reference:

“Private registries ensure images remain within the security and compliance boundaries of the enterprise, avoiding potential risks associated with public SaaS registries.”