Have to agree with your observations. PC games work with a mouse by default, usually with some kind of mouse-clickable button interface like the Dragon seems to have (in touch screen form). But even barely serious gamers invest in joysticks to create that necessary kinesthetic feedback loop. If you command your joystick hand to roll left, and the screen rolls left, your inner ear will react accordingly.

I come back to the fact that the Dragon is an automated commuter bus, and really doesn't need to be flown at all. I'd wager the displays mostly show status information, with few actual controls. A closeup of the hardware panel below the displays shows mostly indicator lights that probably back up the flat panels, like "Deorbit burn"; the most critical info.

Come to think of it, the Tesla has an "autopilot" mode that does a lot of the work of driving. If Tesla made a bus, it would look a lot like a Crew Dragon.