Sure, but I don’t think that what you said is really the succinct version of my more complex response. If you step into a traffic and hear a horn of a car you’ll automatically look in the direction of where the sound is coming from, followed be a visual confirmation of approaching danger and jumping back onto the sidewalk. In this case it is your emotion, emotion of danger, that will guide (not motivate!) your behaviour.
If you stepped into oncoming traffic, the amygdala would react and send a signal to your body before your conscious pre-frontal cortex was even aware of the traffic. The reaction has to be quick and the person does not have much time to think about it. However, I see no reason why all emotions necessarily have to be associated with quick decisions and reason with long thought out responses. The decision by the amygdala sounds reasonable to me. It probably in this instance saved the person’s life. Reasoning that takes years to think out uses emotion also. The emotion would help to guide the thought process. The ideas that stand up to scrutiny will take on a positive emotional connotation the ideas that failed will take on a negative connotation. I have a hard time believing that an evolutionary biologist does not have quite a bit of positive emotion attached to evolutionary theory and negative emotion attached to intelligent design or even Lamarckian evolution. These emotions were developed over years of thought.
Not quite. If we imagine a technology that is advanced enough, the need for splitting into two systems, one for quick imprecise decisions, one for longer precise decisions, would not be necessary.
I don’t know why you think that compartmentalization of functions is a bad, obsolete thing. Compartmentalizing part of the brain to handle quick decisions and another part for long term decisions sounds like a good explanation of how the brain works and an effective strategy. I know that muscle fiber comes in different varieties such as slow twitch, fast twitch A (fast), and fast twitch B (really fast). Maybe the brain uses specialization like this also. (I can’t say for sure that it does, but it sounds reasonable.)