shamans are not a kin to mages, mages have a wholly different education structure set up which is based heavily on arcane text unlike any thing we have seen in shamanism.
There’s also no reason to think he had a better life then the normal soldier he wasn’t in any officer or adviser position he was just a foot man.
this is just fanfic there is no indication what training the player goes throw before the start of the game and becoming the star of the show or that every foot man goes through the same thing.Again, there is a big difference between common people and soldiers, let alone shamans, soldiers of high rank need to at least know how to read, a shaman should know that, he was trained just like the players were in the beginning of the game.
again shamanism isn’t shown to be heavily text based any where him be illiterate would be irrelevant to what they were teaching him and given how many soldiers the horde goes through they likely would have less time then some one higher ranking who can delicate work as they are likely basic army trainers giving soldiers with the aptitude basic training.yeah, they can't take time, but a blood elf will.
the moment they realise their student are illiterate, they would tech him the basic, you argument could, make sense, if it was a warrior, you could pretend to say "they would just teach how to beat up shit" but even then would know that reading is necessary.
We already know the other factions leaders could do it as we know they are literate, it’s effectively the same thing.it would show anyone in the horde can do that and they don't need a elf to do so, it would show horde races are not savages and pretty capable.
Again, this hole bit is obnoxious, how can an elf teach a troll how to read and write orcish or troll, this preposterous the book only helps to force bad stereotypes for the horde.