The point of emotions -- which I see I failed to make sufficiently explicit in this post, from the frequent questions about it -- is that their original purpose was to prepare the body to take some physical, real-world action... and thus they were built in to our memory/prediction systems long before we reused those systems to "think" or "reason" with.

Brains weren't originally built for thinking -- they were built for emoting: motivating co-ordinated physical action.