Seldom do I feel free to pontificate as I have here. I begin with the intra-personal advantages. In the sighted world, pages of uninterrupted black on white text receive almost no reliance as a proper tool to bring forth language and literacy. A sheet embossed with Braille can do this as well. Technology seduces the sighted learner through pictures, colors, attractive and varied sizes of fonts, interesting graphics, graphics shaped into letter forms, letters shaped into graphics, text wrapped around graphics, blackboards, chalk and erasers, animated letters, and much more.
Literacy is mainly a social phenomenon, meant to bind society.
The Braille student learning to read often isolated at crucial times from sighted peers. Brailled paper is not visually interesting. The student will have a difficult time sharing his Braille or his interest in it with peers. One more advantage. Neither the student nor the teacher can afford to waste even the slightest part of their time together.