What is the difference between RHEL and RHCOS when it comes to Selinux. csi-driver-registrar sidecar container works without privilege access in RHEL

Question

On a RHEL setup, csi-driver-registrar has following securitycontext

              securityContext:
                runAsNonRoot: false
                runAsUser: 0
                privileged: false

But on RHCOS, csi socket creation fails.

SElinux strace shows permission denied. When I use privileged: true it works well.
Could someone help to understand the difference here. I am looking for an option with minimum privileges given to container for security reasons.