Since there are truths and lies in this world, it is always beneficial to know the truth....even inconvenient ones....even hurtful ones. Humans search for truth in various ways. We hate being lied to and we can't trust those who don't tell the truth. We don't choose them as companions.
Since the Creator is called a "Teacher" to Israel and Jesus Christ was also called a "teacher" to his disciples, it stands to reason that true teachings are there to counteract false ones. That reinforces the belief that God wants us to believe the truth, not fall for lies or clever propaganda.
Do we care about the truth, or do we only care about what we personally want to believe? If we have been influenced to believe things that are not true and those things will eventuate in our alienation from the Creator (leading to eternal death,) then what is the point of believing those things or clinging onto them when we are shown that they are invalid?
I believe that this life is a training exercise; an object lesson designed to test out who we really are. Do we want to take our direction from our Maker, through his word, acknowledging our inadequacies? Or do we want independence from him, thinking we know better? If we look upon that as "freedom", but it only results in another kind of slavery, how are we benefited?
We can take one of only two roads, according to the Bible.....which one is our choice....one leads to everlasting life....the other to everlasting death. We will not know if we have chosen well until the end. That means that our decisions now will affect us for all time to come.