Childhood experiences are the bedrock of adult personality and functioning and not easily changed. Early in life one develops beliefs about such basic human experiences as trust and the possibility of gaining comfort from another. Thus when a spouse declares that they don't understand their mate's concern, this may honestly reflect an inability to grasp the underlying emotion that the other is expressing rather than being oppositional or passive-aggressive. They having feared certain feelings since childhood when they were used by their parents to control them and thwart their desire for self-expression and autonomy.
These conflicts, when extreme, reflect what is present in Autism and Asperger's Disorder which are among the most debilitating of mental health conditions. The unconscious is powerful and one must respect it's power.