I don't see anything wrong with using a reader and I have never thought that someone was unprepared for using one.
When I'm at shows I make sure I've memorized the test. I can do it on foot, on my horse, draw it on paper and even call it out. But, if there's someone around who can read, I'll ask. Often times I don't really even listen to the reader but I find that it calms my nerves a bit to know that if I do actually forget where I'm supposed to go next, I have back up.
"You know, for as long as I can remember, I've had memories." ~Colin Mochrie