This is where you lost your keys?
No, farther into the park.
Then why are you searching for them here?!?
It’s too dark down there!

As soon as we become aware of our shortcomings, we start mitigating.
Sometimes reasonably, other times rationally.

The drunkard in the example above is unreasonable but perfectly rational.
There was no way in which he could find his keys in the dark, he really needed to find them… so he searched a well lit area!
He had to satisfy his ‘compulsion’ so he did the only rational thing his intoxicated mind was able to come up with.

Unreasonable?
Indeed but…

The drunkard above was aware of his ‘blindness’. Of his inability to see in the dark.
On the other hand, he was used to being drunk. No longer aware of anything unusual. Of having to pay special attention to his mental processes due to his relative ‘impairment’. So he tried his best in the given situation…

Most of the time, we are in the same situation.
We tend to pay special attention to the things going in our favor. And to ignore, until it becomes too late, those ‘suggesting’ we should change tack.