I know. That thought has occurred to me. My home was a model home and the builder had his showroom in the two car part of the garage and two offices in what would have been the third bay. When he finished building, I asked him to leave the two offices when he converted the space back to a garage. So there is ductwork running from the air handler (which is in an air handler closet in the garage) right through the garage to the two offices (one for my wife; one for me) I have a 5 ton unit for my first floor so that probably has enough capacity although I would have to ask.
I would be hesitant to do that though as I would worry about how much AC I lose every time I open the garage door.
But the point to my post is that if one is in a hot area, it is good that Lucid is running the battery cooling system.