Maybe we are that way for good reasons. The subconscious mind is a much better calculator than we often think.

The next book I'm going to read is called The Master And His Emissary. It's about how the two sides of the brain work together to understand the world outside us. The main idea is that one side deals with the big picture while the other focuses on necessary features. I think the master is the right-brain and the emissary the left. If I understand it correctly, the master uses the emissary to focus on the finer details which are then transferred to the big picture, amending it.

This is an edit. I forgot to conclude that somehow or other, the emissary's information is not transferred back objectively, or else the master refuses to deal with it honestly and that might allow for the continuance of bias in some situations. I'll know better after I've read the book.

Yeah, I tell people that although humans are capable of rational thought, they are generally actually rational beings. most humans still make their decisions in part if not wholly based on emotion.