Why does two views but no container compile?

Question

struct ContentView: View {

    var body: some View {
        Text("Hello")
        Text("World")
    }
}

The preview shows the first text field but not the second. They'll both appear if they're contained in a stack.

var f: Bool {
   true
   false
}

This results in the compiler complaining about a missing return in function - a single bool value is ok.

So, why are two views ok but not two bools? Is it a quirk of the view builder?