system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why isn’t Braille just raised letters? Wouldn’t it make more sense if it was?
gpt
Not for reading it quickly. It's designed so that each letter is distinctive by touch - Braille readers don't have to feel each letter individually, they can just run their fingers over a row and read it all at once.

Another thing is, for someone who's born blind, they might never have learned what "normal" letters looked like - and would not need to.

Also, Braille is easy and cheap to produce. You just have a grid of 3x3 or whatever punches, and for each letter, you only activate part of the needles - actually a lot easier to "type" than a regular typewriter where you need dozens of buttons and individual arms.