Inherited renderer, OnElementPropertyChanged implementation

I often see this kind of overrides on custom renderer that inherits from XF renderer and I am thinking it is due to developers not putting too much thought into the function:

    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        base.OnElementPropertyChanged(sender, e); // calls the base method every time

        if (e.PropertyName == .. // custom view properties come after the base method is called

That seems like a waste of resources to me and the base should instead be called only if the custom renderer doesn't handle it:

    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        if (e.PropertyName == "MyPropertyName1")
        {
            // do something here
        }
        else if (e.PropertyName == "MyPropertyName2")
        {
             // do something here
        }
        else
        {
            base.OnElementPropertyChanged(sender, e);
        }
    }

Is there a specific reason why the Forms base renderer's OnElementPropertyChanged should always be called or is the latter the correct way of doing this?