If Viktor was willing to compromise for his goals he'd be working with Jayce. Viktor won't settle for imperfection just because it might make it easier.
A word on the goals of Viktor too. Viktor wishes to remove human flaws, like fear, Viktor is willing to sacrifice what others would deem important for humanity in order to do so. Viktor's goal isn't necessarily to become a machine, but to remove humanities flaws by becoming more like machines. If the consequence is becoming much more machine than human then that is simply how it has to be.
Viktor eliminates "humanity" for the sake of human progress. The Void eliminates humanity because it wants to eliminate everything.