Talk:Sentient/@comment-67.167.9.255-20150731134259/@comment-189.102.120.219-20150804054747

From what I understood the Orokin were in a war with the Sentients, and they were loosing because, despite having miraculous technology, the Sentients had the ability to assimilate their technology and turn it against them. So the Orokin send some of them into the void to desperately look for a weapon or a solution to their problem and when those pioneers came back they were...something...and filled with raw potential or some such, so the Orokin encased them in warframes that could channel that potential energy and gave them primitive weapons: Blade and gunpowder firearms, so that the Sentient would gain nothing by assimilating them. However, the Tenno were masters with these zero-tech weapons, and as such were able to fend off the Sentient.

TL;DR - Sentient "copy" technology and use it against you, so Tenno use zero-tech weaponry to counter that.