Elevator conversation

A: "I'm starting to lose my vision, and it is getting harder and harder to read."
B: "You should learn braile now, while you can still see."
C (a complete stranger to A & B): "Actually, no. Blindness will hypersensitize your fingers and make it easier to learn braile."

Thank you C, where ever you are. That was the best elevator conversational intervention that I have ever experienced. Would we become smarter as a country if more people broke the elevator chat taboo?