do you think is an efficient way to reach people to collect your words in a book with 800.000 words in it when nobody is able to read it?
please consider also that in present times when the majority of people can read, those who read the bible from cover to cover are actually very few. Even less those who understand it.
I don't know what he was supposed to do cause i'm no god, i simply think that of all the things he could have done what he actually chose to do was not a very efficient choice
Difficulty at grasping the actual teachings is more often than not a boon rather than a liability for a doctrine, if it is not too ostensive.
It encourages people to fill the gaps with their own judgement and to attribute most flaws and contradictions to failure to grasp the contents properly.
There is a reason why, say,
Rudyard Kipling's "If" is not considered scripture, despite in many senses fitting the bill so nicely. It lacks that veneer of mystery and ambiguity that demographically succesfull scripture needs.
Were there an actual Abrahamic-styled God, his presence and blessing would logically have to be perceived above all by the wisdom and loving kindness of those inspired by his gifts. It is not like words on paper can be nearly as sublime or personal. But written text is useful for purposes of keeping a sense of revealed mystery, as well as for giving a tangible, visible reference to support a sense of linkage to the original revelation. For some people that is Really Important.