[bluedino]

No tactile feedback, for one.

Here's my test. Take a Touchbar-equipped Mac, and a non-touchbar equipped Mac. Sit them side by side. Play a video or song on both of them.

Then, one hand on one mac and your other hand on the other mac, turn the volume up and down using the keyboard and touchbar.

One hand gets confused on where to go on about your third or fourth time turning it back up or down. There's nothing for your fingers to call home.

It's the exact same problem when you try to use a touch screen phone as a game controller, vs an actual gamepad.