What's the use of Stateless Widget if one can directly return a widget

Question

This might be an odd question but I'm wondering what's the actual use of stateless widget if one can simply return a widget? Stateful widgets on the other hand are useful for handling states because of setState method. Are stateless widget only useful because of access to BuildContext variable?

void main() {
  runApp(MaterialApp(
    title: "Direct",
    home: Scaffold(
      appBar: AppBar(
        title: Text("TITLE"),
      ),
      body: Container(
        child:  Text("TITLE"),
      ),
    ),
  ));
}

The above code works and shows the basic AppBar and Body without using a stateless widget.