There is this question that comes up in nearly every academic discipline, and that is whether things are, or we simply perceive them to be. In western philosophy, this question goes all the way back to Plato and Aristotle. In physics we talk of things being "real" meaning they have definite measurable properties, but it turns out they may not.
There may be a term that covers these, but the ones I use are "absolutism" to describe schools of thought that believe that things are. And "relativism" for schools of thought that aren't absolutism (once you abandon truth, things get a little broader in possibility).
I call this the First False Dichotomy because it certainly could be possible that some things are, while others are only as they seem to be, but no one seems to want to say that.
Much of the Earth is beholden to absolutist ideas. And, insomuch that those with absolutist ideas tend to run into others with different absolutist ideas, much of the conflict on the planet is at least somewhat connected to the fact that absolutism only humors dissension temporarily.
Planet Nine isn't all that concerned in settling the matter between absolutism and relativism, though for transparency's sake I'll state that I'm a relativist. But if you're Thinking Galactically within the lore of Planet Nine, the notion that we would have the universe already figured out, just seems kind of silly.
With this in mind, Planet Nine's approach to questions of "should" focus on humanity's growth as a collective for some future inclusion in an established galactic federation of Fours that look at all the stupid shit we do with the knowing been-there-done-that smile of the parent watching a child fail again and again.