A Little Dumber Than I'd Like A Bank To Be, Ideally

Click on this photo and look at it more closely. This is the drive-thru ATM at my bank. It occurred to me tonight that there is braille on all of the buttons and labels. Why would someone who needs braille be going through the drive-thru ATM?

The engineer in me says its because it is cheaper to make all of the ATMs exactly the same, but the skeptic in me reminds the engineer that the braille is only on stickers, or buttons, which are accessory parts to the ATM unit, and could be produced separately, for probably not any additional cost.