Final answer:
The expression "smoothing over problems" is most closely related to being in denial. Denial is a defense mechanism where reality or facts are not accepted, resembling the act of ignoring an issue as opposed to addressing it head-on.
Step-by-step explanation:
"Smoothing over problems" is an idiom that typically refers to the act of trying to make difficulties appear less severe or to deal with them in a way that minimizes conflict. This phrase is most closely associated with being in denial. Denial is a defense mechanism wherein a person is unwilling to accept reality or facts. It is similar to covering up or ignoring an issue rather than facing it directly. This can be seen as a path to moving beyond suffering if it is a temporary measure, but it often involves a series of aspects of behaving in a way that may ultimately be unwise if the issues are never fully addressed.
For example, the Roman poet Martial in 3.42 suggests that it's better to face issues honestly rather than conceal them, as trouble concealed is believed to be more significant than it is. This emphasizes the idea that acknowledgment of problems is essential for resolution.
Furthermore, the Kübler-Ross model describes denial as the first reaction to the prospect of dying, which indicates the natural human tendency to reject unpleasant realities.