Remove the need for ADMIN permissions for listDecommissionedRegionServers

Why we need ADMIN permissions for AccessController#preListDecommissionedRegionServers ?

From Phoenix, we are calling Admin#getRegionServers(true) where the argument excludeDecommissionedRS is set to true. Refer here.
If excludeDecommissionedRS  is set to true and if we have AccessController co-proc attached, it requires ADMIN permissions to execute listDecommissionedRegionServers RPC. Refer here.
 

  @Override
  public void preListDecommissionedRegionServers(ObserverContext<MasterCoprocessorEnvironment> ctx)
    throws IOException {
    requirePermission(ctx, "listDecommissionedRegionServers", Action.ADMIN);
  }

I understand that we need ADMIN permissions for preDecommissionRegionServers and preRecommissionRegionServer because it changes the membership of regionservers but I don’t see any need for ADMIN permissions for listDecommissionedRegionServers. Do you think we can remove need for ADMIN permissions for  listDecommissionedRegionServers RPC?