Why can't the cluster-reader ClusterRole access all resources in a cluster?

Issue

When using an account with the cluster-reader ClusterRole, it can not access Secrets, EgressFirewall, ServiceMonitor and many other resource types.

Why is the definition of cluster-reader not:

    apiVersion: authorization.openshift.io/v1
    kind: ClusterRole
    metadata:
      name: view-all-the-things
    rules:
    - apiGroups:
      - '*'
      resources:
      - '*'
      verbs:
      - get
      - list

Is there a security reason for not doing this?