People always say things like, "The truth will set you free." Why does the truth matter though? After all, it's very clear that humans are pleasure seeking creatures. Human create self-fulfilling prophecies and believe what makes them happy; reject or stay away from unpleasant things of all sorts; and choose to believe or suppose "half-truths" or the like. Even if someone is a masochist and enjoys pain -- or if someone is suicidal and depressed and wants to end their lives -- we can agree, at least in this context, that the end result is based on an inherent desire and choice one made, which ultimately was driven by the same primal or biological/instinctive need that results in some form of ego-driven action.
People may very well agree with some "truths" that conform to whatever society, culture or beliefs they hold, whether they be true or "truths" at large. Given that anyone can believe in the "truth" -- whatever that means of how you wish to define it -- why would it matter if it was believed or not?
There's no evidence that rejecting the truth is "bad" other than what a society will label as being in denial or delusional. The reality is, accepting a truth or not doesn't change the fact that any truth is, in technicality, no different than something or someone being false. If truth and false are just a binary mask for "good" and "bad," would we not agree that their only purpose is to separate our beliefs of "good" from "bad" by calling "truthhood" the good thing and "falsehood" the bad, whatever that means?
It seems like people want such a logical sense to be applied to these subjective labels. For example, people associate truth with what they believe is true. People believe what's true based on what they are taught or choose to believe is true. No truth or false statement has always been set in stone, just as no good action nor bad action was always inherently justified or accepted/unaccepted throughout the centuries. Again, it would appear that people mask truth and false with "good" and "bad." Court and judicial systems often demand people make the truth when held under oath/etc. People have long associated falsehood with "bad."
In reality, overall, why does truth matter? Just because people say it's good? That's all? So truth and false notions are just masks for a broader sense of ethics and morality -- not provably factual or real?