Very true. A typical reaction when reading advice or something about the typical flaws of people (biases, planning), is "Yeah but that doesn't apply to me". It often takes a deliberate effort to override the inside view and stop finding excuses.

Note that in both cases the mistake makes us look better:

• "I know how others work from the experience of my own mind" sounds better than "I don't understand other people"
• "I don't make that common mistake because I'm different from others" sounds better than "whoops I'm also likely to make that mistake"