Maybe you have read in the bible that before the tower of babel all humans have the same language and where able to talk together. But at the metaphor tower of babel story the hand of god destroys this feature and give speech to the people. Behind this story is the double pack, limitation of speech and consciousness by one method.
Humans consciousness was shattered by a DNA manipulation to separate brain hemispheres, telepathy was shrouded with a left brain receiver for outer command that talk to the human in speech. This thinker guide the human by 50 – 80k of thought commands per day, In outer the separation placed different languages and the need for talk.
Language and speech is limited to few chars and words and not able to represent what can be transfered by telepathy.