Who says they aren't offering programs to learn to read? Even if you went on a literacy campaign and made it a crime to be unable to read & write, you'd still have a transitional period, in which case services exactly like this one would be valuable.
Yes, but that transitional period would be short enough that people wouldn't report (as the OP did) there being a persistent, indefinitely continuing practice of mailmen reading out mail to rural villagers.
