@siblingpastry true. But that doesn’t make it moot. You can also apply aria-disabled which will inform the screen reader that it’s “dimmed.”

Here is a screencast of VoiceOver reading two buttons. The first button has no aria attributes. The second button has the following:

aria-hidden=”true” aria-disabled=”true”

You can see that the button label is denoted as disabled (but only for screen readers) yet still reads the label. And it can be tabbed to.

@markwyner Regardless of the quirks or loopholes you may have found to justify this, an unlabelled button fails SC 4.1.2, and there’s no good reason for doing it.