Our thinking apparatus was developed for fairly simple situations, though we leverage various tactics to manipulate more complex concepts via various forms of abstraction.
Still, this basis shines through in the way people try to understand things in general.
I am standing in the woods, and there is some fruit, and there is a bear. I want to eat the fruit, but the bear may have a cub. What do I do?
The bear is a bear for the duration of the problem, as is the fruit, though we could always come back later and hope the problem has gone away.
We seem to try to understand people and society the same way, and it generally fails, because these are complex, dynamic, ever-changing systems that more closely resemble fire than earth… they are a flow, a process… a reaction… not an object.
In terms of people tasked with the practical side of mental health, we have a faction that thinks of everything in terms of emotion, a faction that thinks only of neurochemistry, a faction that thinks of everything in terms of pure thought and the relations between mental objects… they all make the mistake of trying to understand a system by understanding a single subsystem as if it were more or less unchanging and independent.
But this is forgivable, because this seems to be a collective human hardware limitation, at least with respect to organized fields of study and practice.
A human is an irreversible reaction, early paths taken having a larger impact than later paths, but always subject to deviation.