It's quite common to see people bending the truth if it works for them. It happens far more often than you'd like to think. For example, seeing the weak point of a belief but you choose to ignore it and rehearse the strong points. What's the harm in that?
What if the setting changed - You're in an exam in university, and your GPA depends on it. Your degree demands a GPA of 3.7 (or something). You'd definitely want to attack the weak parts of your answer. It would be so much more relaxing to ignore your large possibly-wrong answer. But no matter how much you defy the universe (haha I don't care I'm too tired or I'm too lazy, why don't you make me correct it), you'll get a lower score. When the setting becomes an exam, you'll have to start correcting all possible mistakes.
Life is that exam, and you will face the consequences for having incorrect beliefs. Treat your beliefs the way you treat your answers on an exam (Except in real life you should be rational out of curiosity, not out of duty, of course).