>>Siempr+(OP)
It is, on the whole, but not immediately. It is kinda like the idea that while having eyes is a huge evolutionary benefit, having just part of the eye confers none. Or like guessing a password by random chance. If you get some immediate feedback by being partially right then it is pretty easy, but if you only know if the password is right or wrong, then the odds of guessing the password rounds to zero.