Well lets see, there's the MCU, the DC Universe, countless ones encompassing classic martial arts movies, I guarantee if you look hard enough you'll find an example in the forgotten realms (that's not classified as "magic" even).
You keep wanting to equate fictional fighters with THIS real world. But we are not in the real world. Most D&D worlds are lands of magic and myth and legend. How is it even a question that in a land of myth and legend a blind man can overcome the disability without resorting to magic?
Ninja'd by
@Cadence!