Tradition is not the worship of ashes, but the preservation of fire. ― Gustav Mahler
Postmodernism arises from reason. Postmodernist thoughts would never arise if reason didn't first arise, and show the rabbit hole that reason leads to.
"Science" does not exist in any inherent way, all that would exist are the fallible acts of observing by of various individuals.You confuse the laws of science with the laws of nature. Nature is what it is, science tries to explain nature and changes as we learn more about nature.
Having "trust" in the accuracy of a scientist is no different than having trust in anyone else, such as a horoscopist. So science has no inherent worth beyond its situational usefulness to an individual.