The smart person says little because they know how soon life comes up with contradictions to any reasonable sounding generality.
If nobody is engaged in the discussion, being right is nearly meaningless but being corrected is impossible.
Attachment to being right is unbecoming. Cultures with undue emphasis and reward for being right are unhealthy. The rewards one gives oneself for being right are a perpetual hazard for disconnecting from the people in ones life. This is one of the divides between the male and female flavors of many cultures. The wise person speaks their mind.