this is the thing that confuses me the most with Pulumi:

var cluster = new ManagedCluster($"{clusterName}-", new ManagedClusterArgs
        {//lots of code})
        var lookupManagedCluster = GetManagedCluster.Invoke(new GetManagedClusterInvokeArgs
        {
            ResourceGroupName = rgName,
            ResourceName = cluster.Name
        });

        var lookup2 = GetManagedCluster.Invoke(new GetManagedClusterInvokeArgs
        {
            ResourceName = lookupManagedCluster.Apply(c => c.Name),
            ResourceGroupName = rgName,
        });

why would I not be able to just pipe the lookupManagedCluster into the lookup2 here? Why does Pulumi think that's an invalid thing, when

cluster.Name

is also just an output? I've read the input/output documentation 100 times, but this is still very confusing to me