Perhaps these aliens think we're not ready to receive their wisdom. Perhaps they judge that we might misuse our newly-gained powers. They possibly deem us too immature to handle this secret knowledge.

BUT THEY'LL SOON CHANGE THEIR TUNE AFTER WE TORTURE THE CRAP OUT OF THEM!!!

BTW I was recently abducted by aliens. An unfortunate 'incident' took place during the physical examination. I have to inform you all that we are officially at war with Neptune.