Reasoning is used to block confrontation with an unconscious conflict, where emotions are simply reasoned to be unreliable, and emotional regulation is done instead. As emotions can overwhelm a person, while acceptance usually will not. Treating emotions as a logical problem to be solved, for instance focusing on financial consequences, instead of love, right after a divorce, could help out with life itself.
When the reasons are unknown. Both the confused emotion and the unsolved logic may compound