The other issue with buttons is that typically buttons are flush-mount. That inevitably means you need to look at the button to press it. So it’s not just that

The other issue with buttons is that typically buttons are flush-mount. That inevitably means you need to look at the button to press it. So it’s not just that you have awful feedback, even starting the process of engaging with the controls takes longer and requires eyes. Knobs and sliders can typically be found with muscle memory getting you first close enough to feel the “landscape” around the control, then use touch to find it exactly. Flush mount buttons almost completely prevent this.