This is a topic on science and the example about someone crying over someone's death is a strange example. It's clear that if it wants to be called "science" then it has to have what you call linear (vs circular?) thinking. And yes there is an objective truth as far as what experience can measure.
Saying "everyone reacts to things differently" is a truism. Then what? As everyone reacts differently, the logical result is to IGNORE the emotional/irrational part of people when we deal about science/technology. As simple as that.