"I used to think that the human brain was the most fascinating part of the body. Then I realized, 'Well, look what's telling me that.' "- Emo Phillips.
Seriously, though...
The good news is that we're not exceptions- everybody does this to some degree, whether a little or a lot, so it's not just us that can be fools at times. Furthermore, we can get better, and we can keep getting better, if we put some work into it. We won't "arrive"- there's no "destination". It's a little like Zeno's Paradox. We can eliminate 1/2 our faulty thinking and bad habits, then we can eliminate 1/2 of what remains, then 1/2 of what remains still, and so on. The effort is worthwhile, IMHO.