Forbidden by WHOM or WHAT? False premise. WHERE in the 10 commandments, Bible, Quran or other sacred writings does it say humans are SUPPOSED to remain ignorant? You do NOT SURVIVE if you remain ignorant. You die anyway, ignorant or not, but your offspring, IF you have any, might live long enough to reproduce. Survival of the fittest. The species and cultures survive and evolve desire the individuals dying.
Forbidden by whom or what?