When someone says "The Truth", that usually refers to moral absolutes.
Unbiased truth usually refers to facts.
We often see scientism, where an effort to understand the scientific rules describing the universe or biology that drives humans is then used to try to justify moral rules that should be the basis of philosophy or religion.
That humans have tendencies we can study and measure does not give them moral weight, and there is a bad tendency to try to use science to justify immoral or totalitarian political regimes. Whether climate science to justify liberal totalitarianism or Lysenkoism and "sluggish schizophrenia" to justify communism or poor quality research to justify eugenics and totalitarianism in the early 1900s, science is NOT apolitical.
A major problem we have today is liberally biased social sciences used to attack conservatives and the Republican party, denying that those sciences have right now a liberal bias and are publishing politically motivated studies.
Survey shocker: Liberal profs admit they’d discriminate against conservatives in hiring, advancement
It’s finally out–The big review paper on the lack of political diversity in social psychology