Role Based Access Control (RBAC) should be enabled on Azure Kubernetes Service (AKS) clusters to enforce fine-grained authorization and restrict access to cluster resources. If role_based_access_control_enabled = false or role_based_access_control { enabled = false } is present in the Terraform configuration, users may gain excessive or unauthorized permissions within the cluster, increasing risk of accidental or malicious actions. Properly configuring RBAC (for example, by using role_based_access_control_enabled = true) helps ensure only authorized identities can perform sensitive operations within the AKS environment.