The problem of sending braille printed text to a blind person and the problem of being able to type braille personally are entirely separate. I can type on a normal keyboard and print out the document as braille. The fact that braille printers are rare is a very sad fact.
The discussion above was not about hand writing (embossing) braille. That is a separate consideration, and I have personally never sent a letter to a friend of any kind, so not being able to send a letter to a blind friend doesn't seem like such a problem to me personally. If I were in the habit of sending hand-written letters to friends and acquaintances, I do think it would be a nice effort to learn braille in case I ever need to send such a letter to a friend.
The discussion above was not about hand writing (embossing) braille. That is a separate consideration, and I have personally never sent a letter to a friend of any kind, so not being able to send a letter to a blind friend doesn't seem like such a problem to me personally. If I were in the habit of sending hand-written letters to friends and acquaintances, I do think it would be a nice effort to learn braille in case I ever need to send such a letter to a friend.