What is the intended effect on layout of FocusScope, TouchArea & Flickable?

[kermitfrog]

As noticed in #10702, wrapping a SpinBox in a TouchArea, will change its layout. And doing so inside a ListView with the Qt backend, will render the items on top of each other (btw: also happens with CheckBox & FocusScope).
While I'm pretty sure, the latter is a bug, I wonder if the changes in layout might be intentional. So I decided to start this discussion before making a bug report.

Consider this example:

export component TestCase inherits Window {
    width: 500px;
    height: 80px;
    HorizontalLayout {
        Text { text: "a test"; } // left upper corner
        
        TouchArea { // same behaviour as FocusScope
            Text { text: "a test"; } // centered
        }

        Flickable {
            Text { text: "a test"; } // centered; growing
        }
    }
}

Here the Text is laid out in 3 different ways. To me this looks like a bug. A wrapper-component should not alter the Layout!

On the other hand... TouchArea contains the word Area. So maybe it's not meant as a wrapper, and is behaving as expected.

Can someone clarify this? Is the effect on layout intended or not?
If it is intended: Why? Wouldn't it be better to be layout-transparent?