Properly defrosting/defogging the windows would be more than just a fan control. Ideally you want to ensure the AC compressor and heat are both running and you need to change the vent settings.
Far better to have a dedicated defrost button next to the driver's normal controls that does it all as a single toggle rather than have the driver make multiple adjustments. Which is what I have on both of my cars, one of which people complain about how it's just a giant touchscreen.
Far better to have a dedicated defrost button next to the driver's normal controls that does it all as a single toggle rather than have the driver make multiple adjustments. Which is what I have on both of my cars, one of which people complain about how it's just a giant touchscreen.