I think you miss-interpreted my post. I was referring to the rear wiper itself, not the button.Huh? On every car I've ever driven you control the rear wiper by pushing the wiper stalk forward or backwards? How's that "looking trash"?
Most modern saloon cars and ‘sport back’ crossover SUVs don’t have a rear wiper because of there is nowhere to physically put the wiper without just plopping it in the back of the car which looks trash.
You don’t really need one anyway, as soon as you are moving, the water beads off the glass.
On a car with a more square back, you can hide the wiper at the top under the rear spoiler. Likewise, the glass also gets a lot dirtier than a saloon car and it doesn’t bead off.