How to hide parent in Hierarchy and maintain child?

Hi all,

Ive been doing some research on hiding objects in the Hierarchy IDE, which now works fine as long as the object doesnt have a hierarchy of its own.

In another words, lets say I have an Object Tree, which have a child Leaf. Aside from that, lets say I have some Light at the scene. In this case, if I choose Light, I want everything else to be hiden, which is working at the moment. If I choose Leaf, then both the Leaf AND the Tree gets displayed, which is not what I would expect. If I choose Tree, then both the Tree AND the Leaf gets hidden, which also is not working properly. The proper way of it to work would be to hide everything that is not what I selected.

This is what my code looks like:

 public static void HideObjects<T>( int choice )
 {
     object[] allObjects = FindObjectsOfTypeAll(typeof(GameObject));    
     foreach(object currObj in allObjects )
     {
         GameObject currGo = (GameObject) currObj;
 
         Component[] listOfComponents = currGo.GetComponentsInChildren (typeof(Component));
         for( int i = 0; i < listOfComponents.Length; i++ )
         {
             currGo.hideFlags = HideFlags.HideInHierarchy;     
             if ( listOfComponents[i].GetType () == typeof(T) && mouseSelected == choice )
                      currGo.hideFlags = HideFlags.None;
             else
                      currGo.hideFlags = HideFlags.HideInHierarchy;   
         }
         
         currGo.SetActive (false);
         currGo.SetActive (true); 
     }
  }

What else can I do here in order to hide only a specific object even though this object is in an hierarchy? How to hide a parent without hiding its child or how to hide a child without hiding its parent?

Thank you all!