To admit you were wrong can be emotionally shattering.
You are left reeling and alone with that voice inside your head yelling, Dignity and self-esteem are gone, replaced with shame, guilt, embarrassment, and anger (usually self-directed).
You think I'm going overboard with this description? Not only have I been there, but I get letters from victims every day and that's exactly how they all feel.
From "The Sociopath Next Door" Martha Stout describes four traits that help identify a sociopath/psychopath (things that they try to get you to believe): 1)We're the same 2)Keep my secrets 3)You owe me 4)Woe is me (the pity play).
Once you're attuned to this, you will be amazed at how many people display these traits. They make mountains out of molehills and molehills out of mountains.