He Raises a Good Point
Have you ever looked closely at a vending machine and wondered why there are braille numbers on the buttons? It’s not like blind people can actually see what’s inside the vending machines, can they? And even if they could, why would they need braille? These are the types of questions that keep the OP up every night.
For those who don’t know, modern vending machines have speakers to inform the visually impaired of what items are in which racks. That way, they can enjoy the unhealthy treats that pop out of a vending machine, just like the rest of us. Does that answer your question, mysterious confused person?